the

ithout differentiation of organs, grows out into several fingeraped processes, which are generally directed towards the stal end of the ovicell" "these finger-shaped processes e divi led up by a series of transverse constrictions into rounded asses of cells, each of which becomes a complete larva; w rare cases in the Tunicates and Coelenterata, where the exual reproduction of buds takes place from very feebly deeloped embryo forms are cited.-On two new genera and some ew species of earthworms, by Frank E. Beddard, F.R.S. lates xxv. and xxvi.). Describes Trichochata hesperidum, v. gen. et spec. from Jamaica; Alvania millsoni, nov. gen. spec. from Lagos; Polytoreutus magilensis, n. sp. from agila, East Central Africa; and Pygmæodrilus lacuum, n. sp. Om Lagos. There are also notes on Siphonogaster millsoni, E.B.-Observations on the gregarines of Holothurians, by E. Minchin, B. A. (plates xxvii. and xxviii.). These gregarines parently first indicated by Kölliker, and identified by hneider (1858), have since been studied by Cuénot, Minzzini, Ludwig and Léger, and have now been closely instigated from fresh material found at Naples and Plymouth, the author. Gregarina irregularis, n. sp. found on the Dod vessels of Holothuria, at Plymouth, is described; nume. is details about the spores and sporozoites are given, and the ficult question of the affinities of these forms is discussed.new Sporozoon in Amphioxus, by E C. Pollard (plate x.). These minute parasites were discovered in the epithem of the intestine. Miss Pollard also figures a ciliate Protoan found in the atrium of Amphioxus, which had been found me time back by Prof. Ray Lankester, he suggests that ssibly the Sporozoon may be a stage in the life history of the ate form.-Studies on the Protochordata, by Arthur Willey. On the origin of the branchial stigmata, præoral e, endostyle, atrial cavities, &c., in Ciona intestinalis, Linn., h remarks on Clavelina lepadiformis (plates xxx. and xxxi.). the result of prolonged and very complete investigations, author finds himself compelled to completely alter his preusly published views as to the homologies existing between various organs of the Ascidians and Amphioxus.

It was

Wiedemann's Annalen der Physik und Chemie, No. 3, 1893. Electromagnetic theory of colour dispersion, by H. von Imholtz. A mathematical deduction of Fresnel's and uchy's formulæ from the electromagnetic theory of light by ans of an application of the principle of least action to ctrodynamics.-Magnetisation of a radially slit iron ring, by inrich Lehmann. The method employed was practically tof Ewing, with ballistic measurement. The normal curve the closed ring was first determined. The ring was then slit ally, and the width of the slit regulated by plane parallel s of brass introduced between the faces, the ring being tened by a brass collar whenever necessary. To measure flow of induction through the slit, the brass disc was wound a number of turns of very fine copper wire. The width the slit was varied from 0'4 mm. to 3'57 mm., and the ngth of the magnetic field from I to about 300. nd that the coefficient of dispersion, i.e. the ratio of the an induction to that at the slit, increased with the width of slit and finally decreased with increasing field intensity. divergence of lines of force was practically limited to the ghbourhood of the slit. For each width of slit the coeffiof demagnetisation was constant up to about half saturation t. A formula is given for calculating this coefficient from geometrical dimensions of the system.-On the influence of perature upon circular ferro-magnetic polarisation, by Emil sch. Transparent plates of iron, nickel and cobalt were pared by electro deposition upon a transparent film of inum burnt into a glass plate 2 mm. thick and free from ble refraction. Lippich's half-shadow polarimeter was used measuring the circular polarisation. The light was furnished a zirkonium burner, and the magnetic field by a large tromagnet fed with a current of 33 amperes giving a field 000 C.G.S. units. The metallic films were enclosed in a is box heated by two Bunsens, the temperatures being sured by thermometers and an iron-german-silver-thermoAs a result, Kundt's constant, or the ratio of the rotation he plane of polarisation to the increase of "magnetisation ntial" from one side of the film to the other, was found be independent of the temperature within the limits observational error.- Also papers by E. Lommel, F.

Bulletin de l'Aca lémie Royale de Belgique, No. 2, 1893.-We notice the following papers :-On a new form of blende, by G. Cesáro. The specimen occurred in the granular dolomite of Binnen, in the form of a light yellow translucent crystal 3 mm. in diameter. Its crystalline form is that of the tetrahexahedron, the trihedral angles being truncated by striated scalene triangles.A new electrical process permitting the production of temperatures superior to those actually realisable, by Eug. Lagrange and P. Hoho. The new method consists in the passage of a current through a conducting liquid by means of electrodes, one of which is made of the substance to be raised by a high temperature. M. Violle has recently estimated the temperature of the electric arc at 3500° C. and found that it is constant, so that it represents the highest temperature attainable by that method. In the new method the heat is developed at the surface of the electrode. During the passage of a current of, say, 2000 volts and 150 amperes through a 10 per cent. solution of sulphuric acid, a layer of gas is formed round an electrode consisting of a plate of graphite, and since the resistance of the circuit is concentrated in this layer of gas, practically the whole energy of the current is transformed into heat in the immediate vicinity of the substance to be operated upon. The temperature rises until the amount of heat, dissipated by conduction and radiation, is equal to that produced. If the production of heat is very rapid, this limit will be very high, and the temperature obtainable depends simply upon the strength of the available

current.

Annalen des K. K. Naturhistorischen Hofmuseums. Bd. vii. (Wien, 1892).—The last two parts (Nos. 3 and 4) of the seventh volume of the Annals of the Royal Natural History Museum of Vienna fully maintain the credit of this publication.-In his Contributions to the knowledge of the Crustacea of the Canary Islands, K. Koelbel describes and figures Livoneca sulcata, n.sp. and Munidopsis polymorpha, n. sp. -The species of Alectoria and their geographical distribution, by Dr. E. Stizenberger.-A contribution to the morphology of Corundum, by Dr. H. Barvír. Two twin sapphires are described and figured. In Part II. of his "Meteoric Studies" E. Cohen gives analyses of twelve American meteorites. Two plates illustrate F. Siebenrock's paper on the skulls of the Scincoidæ, Anguidæ, and Gerrhosauridae, twenty-six species of the first and three each of the second and last are referred to.-New forms of Hymenoptera, by F. F. Kohl (three plates), thirty-eight new species are described and one new genus Heliocausus.-On the typical specimens of Lacerta mosorensis, Kolomb. (1886) (= Lacerta koritana, Tom. 1889) by Dr. F. Steindachner (pl. xvi.).-Contributions to the_Microlepidopteran fauna of the Canary Archipelago, by Dr. H. Rebel (pl. xvii.). Ten new species and two varieties are described and figured, and one new genus, Hypotomorpha. The paper concludes with a valuable index and table of the geographical distribution of sixty three Microlepidoptera; the distribution includes west and east Canary Islands, Azores and Madeira, N. W. Africa, Mediterranean region, and other regions.-Part IV. contains the following papers :Remarks upon the species of the genus Potamogeton in the Herbarium of the Royal Natural History Museum, by A. Bennett; three new species are described. -Compositæ Hildebrandtianæ et Humblotianæ in Madagascaria et insulas Comoras collectæ, by Dr. F. W. Klatt (six new species).Lichenes exotici Herbarii Vindobonensis, by Dr. J. Müller.The birds of Austro-Hungary and of the land of occupation in the Royal Natural History Museum of Vienna, by Dr. L. R. L. v. Liburnau.-On vertebral assimilation among the Lizards, by F. Siebenrock. Normally but two sacral vertebræ support the pelvis in lizards, but in 1864 Hyrtl described under the term "Wirbelassimilation " deviations from this rule. In this paper several examples are given in which the last lumbar or the first caudal vertebra is connected with the pelvis: a figure is given of the latter arrangement in a specimen of Uromastix spinipes, and of the former in a specimen of Lacerta Simonyi. The last paper-Old Mexican relics from the Castle Ambras in the Tyrol, by F. Heger-is of ethnological interest. Four photographic plates, and one in colours, illustrate this paper, and, like the majority of the illustrations of this journal, are of the highest excellence.

SOCIETIES AND ACADEMIES.

LONDON.

Mathematical Society, March 9.-Mr. A. B. Basset, F.R.S., Vice-President, in the chair.-Mr. T. J. Dewar exhibited, with the aid of a stereoscope, twenty stereographs of the regular solids. These were not photographs of a solid object from two points of view for binocular vision, but the same object was drawn twice over by Mr. Dewar in perspective with different station points. The relief was aided by making the lines in the foreground thick, and those behind thin.-Mr. Love read a note on the stability of a thin rod loaded vertically. Suppose a thin rod or column is held vertically at its lower extremity, and loaded at its upper extremity. It is well known that, unless the load exceeds a certain limit, the rod will be simply compressed longitudinally without being bent. If, however, the limit is exceeded there exists a curved form in which the rod can be held by the application of the given load. This form must belong to the elastica family of curves. Now when the length and the load are given the elastica is not entirely determinate. In fact for the same length and the same load (if sufficiently great) there exist forms having respectively 1, 2, 3. inflexions. These are the curves figured in Thomson and Tait's "Nat. Phil.," part ii. p. 148, and for our present application the rod must be supposed held at the middle point of one of the bays, into which it is divided by the line of action of the load. Thus the part of the curve between the point of support and the nearest inflexion is half a bay, the rest of the curve up to the point of attachment of the load consists of an integral number of complete bays. Now although all these forms are possible there is only one which is stable, and that is the form with a single inflexion. To prove this we have to investigate the potential energy in the configuration with a single inflexion, in which the curve forms a single half bay, and in the configuration with 2+1 inflexions, in which the curve forms + bays. It is not difficult to prove that in every case the latter potential energy is the greater. It follows that the figures given by Euler's " Theory of Struts in which the rod forms a curve which is nearly a curve of sines of small amplitude crossing the line of action of the load more than once are all unstable forms. The stable form is a curve of finite curvature, which never crosses the line of action of the load. -Prof. Lloyd Tanner next made a communication on complex primes formed with the fifth roots of unity. The object of the paper is to explain a method of calculating the complex prime factors of real primes included in the form 10μ+ 1. The only published method which I have met with is due to Kummer. This is not restricted to the particular case here considered; but as it involves the determination of the G.C.M. of two complex numbers, it is probably more laborious than the method now communicated. The method adopted by Reuschle in the calculation of his tables does not appear to have been published. The process here is based on the indeterminate equation

"

A minimum solution of this equation gives the "simplest prime factor according to Kummer's definition (Berlin Monatsberichte, 1870, p. 413) and solutions in which Y is a multiple of 5 give the "primary" prime factors which Kummer found it necessary to use in order to establish the general law of reciprocity. In solving the equation Lagrange's method turns out to be impracticable, and a short discussion-treated graphically-is introduced, which is sufficient to show the relations between the different solutions. These relations can be expressed in the form

The values of a have to satisfy other conditions, some of = are tested by mere inspection. To give some idea of the of the method from the calculator's point of view it stated that the determination of the prime factors of t selected at random in the second million (viz. 1,562. 1,671,781) was completed in three hours. The only an table required is a table of squares and if this externes square of 7000 it will suffice for the factorisation of all the first nine millions. Tables are appended giving the s -and simplest primary-prime factors of all suitable fr than 10,000 The reciprocal factors are also given a first thousand. For the first thousand the reciprocal fact already been published; and instead of giving these is comparison is indicated between the factors here given an: published in Reuschle's tables. The result of the con suggests that Reuschle's method of calculation was not the a as that now communicated.-The dioptrics of gratings by Larmor, F. R.S. When a beam of light falls on a continuous or striated surface, in addition to the principal portion the p on and the portion that is scattered and lost by the rougham the surface, there are formed a series of secondary de beams that are propagated onward in oblique directions of these beams is produced in the well-known mannerunion of the elements from the different striations logous groups of striations), which arrive at its front in a c phase. The dioptrical discussion of such diffracted hear is so far as regards their geometrical properties, forms a .. simple case of the theory of the refraction of a generai 4. pencil, which has been developed by Hamilton, Mas other writers. In the case of homogeneous wave-length the principal beam, coming from its focal lines, is re the striated surface to two other focal lines, the th beam is propagated as if it were simply refracted surface formed by adding on at each point a thickness -1 of the refracting medium in front of the original surize m is the number of striations counting from any aibiran on the surface up to the point. The case of reflexion is i by making μ = 1. As a special example, it is well k the positions of the primary and secondary foci for conce in a spherical Rowland grating, are determined by 1 formulæ as hold for reflexion in a curved mirror. Te ment of the aberration at the focal lines, or the discuss caustic surfaces of the diffracted beams, is reduced e to the Hamiltonian formulæ by noting that the char function of the beam is increased by the quantity ( exactly, in crossing the diffracting surface. The secre a brief abstract of a note by Prof. L. J. Rogers on a thre symmetry in the elements of Heine's series. - Messrs use Walker, Cunningham, and the Chairman joined in cussions on the papers.

-

Royal Microscopical Society, March 15Michael, President, in the chair.—The president su: series of thirty-six photomicrographs had been se Society of Arts, in compliance with the request read at the meeting, for exhibition at Chicago.-An electric turne exhibited on behalf of Mr. Payne, of Newcastle. Ite of a brass turntable of ordinary pattern having an elect fitted beneath the plate; the whole was caused to resist current from a bichromate battery cell.-Dr. W. H gave a brief description of Prof. Butschli's experimes so-called artificial protoplasm; and said in conclus could not suppose that any one looking at these form regard them as in any way allied to living matter. intimately they became acquainted with them sure they would become that they were only forms, those which appeared under a low power to be sa m tissue were under a high power seen to be minute nothing more. He believed the movements observed w found to be due to the effect of differences of surface ** and that the study of them would no doubt help thes stand some of the mechanical properties of protoplast did not leave an impression that they had caused £3 mation in the least degree towards the artificial proe protoplasm. Mr. R. T. Lewis exhibited and descr species of Aleurodes (A. asparagi) which had been k the leaves of asparagus in Natal.-Mr. T. F. Santà real on the use of monochromatic yellow light in photom< -Prof. F. Jeffrey Bell read a note from Dr. A. M. E

a simple mode of illumination for the microscope.—Surgeon V. Gunson Thorpe's paper on the rotifera of China was read by Prof. Bell.-Dr. G. M. Giles's paper on certain cystic worms which simulate the appearances of tuberculosis was also read by Prof. Bell.-Dr. R. G. Hebb said that he had never met with any of the worms described in England. He had found nodules in the lungs of sheep, and although unable to find the worm, he had supposed it to be the cause of what he had found. -Prof. Bell thought that what Dr. Giles stated in the beginning of his paper was of considerable importance, because if the large number of animals which were killed as being tuberculous were really not so, it might be possible to prevent their destruction. There was, he imagined, a general dislike amongst most persons-except such as were fond of high game-to eating meat which swarmed with parasites of any kind; for if it was correct that the cattle in India which were reputed to be highly tuberculous were not so, it was very important that the fact should be widely made known. The president said that he fully agreed with Prof. Bell in his remarks.-Dr. A. C. Stokes's paper on new brackish water infusoria from the United States was taken as read.

a

Linnean Society, March 16.-Prof. Stewart, President, in the chair.-A curious freshwater alga, growing in perfectly spherical mass without any visible point of attachment, and described as a condition of Cladophora, was exhibited by Mr. A. W. Bennett, who stated that specimens had been found in English and Welsh lakes, as well as in Sweden, and that the peculiar spherical form of growth was difficult to explain. Mr. G. R. Murray suggested that it might be due to the action of a current, which would cause a continuous revolution of the mass.-Mr. R. I. Pocock exhibited a singular nest, so called, of a myriopod received from Sierra Leone, and formed of a clayey earth, which had become hardened by exposure. It was suggested that it was not a nest in the proper sense of the word, formed by the creature itself, but rather a case fashioned by ants for the purpose of entombing their enemy.-Mr. G. F. Scott Elliot gave an interesting account of the botanical results of the Sierra Leone Boundary Commission, and of the collections made by him during five months travelling. His remarks were criticised by Messrs. J. G. Baker, C. B. Clarke, W. Carruthers, and Dr. Stapf, who was present as a visitor. -Mr. J. H. Venstone described some points in the anatomy of a mollusk (Melongona) from recent Hissections made by him, and exhibited several preparations in Support of his statements. Prof. G. B. Howes bore testimony to the originality and value of the observations which in some respects were at variance with the views of the most recent writers on the subject. Messrs. G. R. Murray and Horace Monckton offered some remarks on the similarity in certain respects of the fauna and flora of the West Coast of Africa and The East Coast of South America, with reference to the statenents made by Mr. Pocock and Mr. Scott Elliot.-The meeting adjourned to April 6.

Anthropological Institute, March 21.-Prof. A. Maclister, F.R.S., President, in the chair.-Dr. Tylor exhibited a Collection of the rude stone implements of the Tasmanians, howing them to belong to the paleolithic or unground stage of the implement-maker's art, below that found among preistoric times in Europe, and being on the whole the lowest known in the world. Fragments or rough flakes of chert or nudstone, never edged by grinding, but only by chipping on one surface with another stone, and grasped in the hand withut any handle, served the simple purposes of notching trees or climbing, cutting up game, and scraping spears and clubs. The Tasmanians appear to have kept up this rudimentary art n their remote corner of the world until the present century, and their state of civilisation thus becomes a guide by which to udge of that of the prehistoric drift and cave men, whose life n England and France depended on similar though better imlements. The Tasmanians, though perhaps in arts the rudest of savages, were at most only a stage below other savages, and lo not disclose any depths of brutality. The usual moral and ocial rules prevailed among them; their language was efficient and even copious; they had a well-marked religion in which he spirits of ancestors were looked to for help in trouble, and he echo was called the "talking shadow." Such facts make t clear that neither antiquity nor savagery reaches to really

primitive stages of human life, which belongs to a remoter past. A paper by Prof. Politis on burial customs in modern Greece was read; also a paper on the cave paintings of Australia, by the Rev. John Mathew.

EDINBURGH.

Royal Society, February 20.-The Hon. Lord Maclaren, vice-president, in the chair. Mr. Malcolm Laurie read a paper on the anatomy of the Eurypterida. Cheliceræ exist in front of the mouth in Slimonia and Eurypterus, thus making the number of cephalothoracic appendages in these forms agree with that of the arachnida in general. The presence of an epiconite on the basal joint of the walking limbs is also an arachnid character. plate-like appendages, each of which appears to have borne one The third to sixth free segments in Slimonia carry paired whole ventral surface of each segment; Slimonia differing in or more branchial lamellæ. There are sternites covering the this respect from Eurypterus, which, according to Schmidt, has no sternites on these segments. The suppression of the sternite of the second free segment and the reduction of its appendage to nothing but branchial lamellæ is due to the enormous development of the genital operculum which covers this region. This suppression of the second segment seems to point to a closer relation of these forms to the Pedipalpi, in which the same thing occurs, than to the scorpion, in which the second segment and its appendage are well developed.-The Rev. Prof. Duns discussed the early history of some Scottish mammals and birds.-Prof. Rutherford communicated a paper, by Dr. W. G. Aitchison Robertson, on the digestion of sugar in health.

March 6. Mr. T. B. Sprague discussed a new algebra, by means of which permutations may be transformed in a variety of ways, and their properties investigated. In this algebra seven symbols of operation are used, the multiplication table being

Prof. Tait read a note on the compressibility of liquids in connection with their molecular pressure.

March 20.-Dr. D. Gill, H. M. Astronomer at the Cape of Good Hope, communicated a paper illustrated by photographs on recent progress in celestial photography. The method recently used for the determination of the sun's distance by observations of the planet Victoria was also described. A number of separate series of observations have been made-each series by itself being more trustworthy than observations made during a transit of Venus. The results indicate also that the present estimate of the mass of the moon is about one per cent. too large. -A paper was communicated by Dr. Robert Munro on a remarkable glacier lake, formed by a branch of the Hardanger-Jökul, near Eidfiörd, Norway.

PARIS.

Academy of Sciences, March 20.-M. Loewy in the chair. -On the next solar eclipse, by M. J. Janssen.-On the preparation of a variety of swelling graphite, by M. Henri Moissan. M. Luzi has divided the varieties of graphite into two classes, according to their behaviour on treating with a little nitric acid and calcining. Those which swell up he calls graphites, and those which do not graphitites. The varieties produced ordinarily in the electric arc and by solution in iron do not swell. It can, however, be obtained in the first condition by suddenly cooling the casting in water, when the swelling graphite will be found in the more interior portions. The best way of preparing it is by means of molten platinum. About 200 gr. of platinum are fused in a carbon crucible placed in the elec

It is

ric furnace. When the metal fu ses it gets saturated with carbon, orming a carburet mixed with free carbon, which after solidification exists in the form of swelling or true graphite. separated by aqua regia. The residue consists of slate-grey hexagonal crystals of density 2:06 to 2:08, burning in a current of oxygen at 575°. From 400° upwards it swells like mercury sulpho-cyanide. It is not attacked by fused nitrate of potassium, chromic acid, or hot sulphuric acid, but is rapidly attacked by warm iodic acid and fused sodium carbonate. The swelling up is attributed to the sudden liberation of heated gas due to the decomposition of a very small quantity of graphitic oxide produced under the influence of nitric acid at the expense of a trace of amorphous graphite mixed with the crystallised variety, and more easily attacked than the latter.-Researches on samarium, by M. Lecoq de Boisbaudran.—The pancreas and the nerve centres regulating the glycemic function; experimental demonstrations derived from a comparison of the effects of a removal of the pancreas with those of bulbary section, by MM. A. Chauveau and M. Kaufmann. Medullary section, preceded or followed by bulbary section, produces exactly the same effects as medullary section preceded or followed by the removal of the pancreas. As regards, therefore, the physiological action exerted upon the sugar-forming apparatus, this last operation behaves exactly like the bulbary section. Now the latter determines the super-activity of the liver by suppressing the transmission of the influence of an inhibitory centre situated in the medulla oblongata. As a necessary result, the removal of the pancreas acts in an analogous way in producing hyperglycemia and glycosuria. This operation amounts to the annihilation of the centre controlling the glycogenic function. Hence the pancreas acts upon this function by exciting the activity of this inhibitory centre, and probably also by influencing the exciting centre, which is, on the other hand, checked in its activity by the products of internal pancreatic secretion poured into the blood. The results of the whole experimental investigation on the pathogeny of diabetes are embodied in sixteen propositions. On the distribution in latitude of the solar phenomena observed at the Royal Observatory of the Roman College during the fourth quarter of 1892, by M. P. Tacchini.-Photography of the solar corona apart from total eclipses, by M. George E. Hale.-On electric waves along fine threads; calculation of the depression, by M. Birkeland.— On initial capacities of polarisation, by M. E. Bouty.-Influence of frequency upon the physiological effects of alternating currents, by M. d'Arsonval.-Measurement of large differences of phase in white light, by M. P. Joubin. A new method of rendering visible the fringes produced by two interfering systems of waves consists in placing an anisotropic compensator upon both the groups which have traversed the interference apparatus. This compensator then receives polarised light which, before being analysed, passes through a plate of quartz with its principal section at an angle of 45° to the plane of polarisation. Such an arrangement has been carried out in one of Fizeau's apparatus for measuring expansions. It reads direct to of a micron.On spherical aberration of the human eye; measurement of senilism of the crystalline, by M. C. J. A. Leroy. The mean aberration is a function of the age which grows slowly in young people and very rapidly after mature age, tending towards a maximum in old age. The spherical aberration of the eye also depends principally upon the crystalline and notably upon the variability of its index of refraction. In young people this variability is rapid enough to sensibly correct the aberration. It decreases with age, and tends to a limiting value which it would have if the crystalline had a uniform index throughout. -Electrical crucible for the laboratory, with directing magnet, by MM. E. Ducretet and L. Lejeune.-On a phenomenon of dissociation of sodium chloride heated in presence of a wall of porous earth, by M. de Sanderval.-On hydurilic and desoxyamalic acids, by M. C. Matignon. Action of cotton upon sublimate absorbed in dilute solutions, by M. Léo Vignon.—Influence of the alkalinity of blood upon the process of intra-organic oxidation provoked by spermine, by M. Alexandre Pohl.-Production of sugar diabetes in the rabbit by the destruction of the pancreas, by M. E. Hédon. -Improvement of potato-culture for industrial and forage purposes in France, by M. Aimé Girard.-On the employment of ruthenium red in vegetable anatomy, by M. Louis Mangin.-Permian fish fauna in France, by M. H. E. Sauvage. -On the manifestation, for more than six hundred years, of sudden variations of tempera.

ture on fixed dates during the second fortnight of January, by M. Dom D. Démoulin.-Destruction of trees and public health, by M. J. Jeannel.

BOOKS, PAMPHLETS, and SERIALS RECEIVED

BOOKS.-Laws and Properties of Matter: R. T. Glazebrook (K. PaulBritish Fungus Flora, vol. 2: G. Massey (Bell).-Text-book of Comparative Geology: Dr. E. Kayser, translated and edited by P. Lake (Sonnenschen Beiträge zur Biologie und Anatomie der Lianen. Zweiter Theil:-Beitige zur Anatomie der Lianen, Dr. H. Schenck (Jena, Fischer).-Erre Complètes de Christian Huygens, vol. 5 (La Haye, M. Nijhoff)-Statist of the Colony of Tasmania, 1891 (Tasmania).-Meteorological Observations made at the Adelaide Observatory. &c., 1890 (Adelaide).-Lehrbuch der Entwicklungsgeschichte des Menschen und der Wirbelthiere, Dr. C Hertwig (Jena, Fischer).-Topographische Anatomie des Pferdes. Erster Teil:-Die Gliedmassen: Drs. Ellenberger and Baum (Berlin, P. PareyDistribution de la Vapeur: A. Madamet (Paris, Gauthier-Villars)-Lela P. Langlois (Paris, Gauthier-Villars).-Universal Atlas. Part 25 (Casse PAMPHLETS.-Diagrams of Isothermal Lines of New South Wales. -Ha storms: H. C. Russell.-Das Genetische System der Chemischen Elemente W. Preyer (Berlin, Friedländer), -Further Studies of Yuccas and their Pol tion: W. Trelease (St. Louis, Mo.).-Museums Association, Report Proceedings, &c., at the Third Annual General Meeting.-The Negro in re District of Columbia: E. Ingle (Balt.).

SERIALS.-Memoirs and Proceedings of the Manchester Literary and Philosophical Society, vol. 7, No. 1 (Manchester).-Journal of the Coler of Science, Imperial University, Japan, vol. v., part 3 (Tokyo).

Science in the Public Schools and in the Scientific
Branches of the Army

Climbing Plants. By W. Botting Hemsley, F.R.S. j..
Clapham Junction and Paddington Railway
Notes...

Our Astronomical Column:

Comet Holmes (1892 III.)

Wolsingham Observatory, Circular No. 34
Jupiter and his Satellites.

The Horizontal Pendulum.

The Rising and Settings of Stars
Geographical Notes

The Institution of Naval Architects.
The Action of Glaciers on the Land
Further Studies on Hydrazine. By A. E. Tutton
The International Congress of Prehistoric Arch-
æology and Anthropology. By A. C. H.
Scientific Serials . .

Societies and Academies.

Books, Pamphlets, and Serials Received

515

515

519