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I should not have deemed it worth recording. Having requested my friend to write down the facts, I send them in his own words. "Remembering your request, I will now fulfil my promise to send you all the particulars I could obtain respecting the cuckoo that spent a winter in England. The bird was reared when young by hand from the nest, and became quite domesticated, flying in and out of the house occupied by a farm labourer, whose father was an invalid, who never left his room, and who prevented the bird being disturbed after taking up its place on a clothes peg over his bed, in which position the bird remained the whole of the winter, without moving or taking any food, apparently in quite a dormant state. In the month of April it flew away uttering the usual 'cuckoo, cuckoo,' and was seen no more. The bird on the perch was a familiar object to all who entered the cottage during that winter and continued to excite astonishment. This occurred some years since in the village of Humphrey's End, near Stroud, Gloucestershire." Surely some witnesses can still be found of such an extraordinary event amongst the residents of Humphrey's End, and your readers, like myself, would like to know what they have to say about this hybernating cuckoo.-W. P., Shrewsbury.

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A WHITE SPARROW.-On the 2nd of October last, I got from one of the porters at the railway station here a beautiful specimen of what may be termed a white sparrow. It had been frequenting the station for some time back, and had been traced to its roosting-place in the goods shed, where it was caught at night by means of a lantern. Its head and neck is pure white, its breast and belly of a dull white, the forepaws of the wings pure white, the flight feathers of the usual colour, centre feathers of the tail white, its beak and legs of a very light colour with a faint tinge of yellow. I have kept it in a cage since I got it, and it is now getting very tame. -A. F., Anstruther, N.B.

GOLDEN EAGLES' EGGS.-The relation of a friend of mine has in captivity a female golden eagle that has this past season laid two eggs of which I am now the fortunate possessor. They are of the usual dull white colour, and one of them only has the reddishbrown markings on it which are rather faint; the other is almost a uniform dull white, with scarcely a mark on it. Would the fact of the eagle being kept in captivity have anything to do with the marks on the eggs? And is it not remarkable that an eagle kept in captivity should lay at all? Perhaps some of the numerous readers of SCIENCE-GOSSIP would kindly give me this information.-A. F., Anstruther, N.B.

TWIN FLOWERS ON SAME STALK.-I have observed the same peculiarity as R. H. Wellington mentions in your issue of January, not only on dahlia stems, but on hellebore with purple flowers.-S. A. B., Cushendun.

LARGE UNIOS AND ANODONS.-My December note seems to have been a little misunderstood. I did not cite my 6 in. A. cygneus as in any way extreme, specimens quite equalling the largest mentioned on p. 22 (9 in.) having been found profusely, I am told, in Victoria Park, London, a few years back. The record of U. pictorum up to 5 in. is most interesting as being by no means general. A critical synopsis of authenticated maximal lengths would form a valuable addition to future works on this subject, especially if accompanied by short notes of habitat, as bearing on the elaboration of shell-matter. Do the most

prolific areas produce the largest forms as well?— Ernest G. Harmer.

YUCCA. Is it usual for the yucca to blossom outof-doors in midwinter? At the present time three plants of one of the yucca species have each a fine spike. The heights are respectively, thirteen inches, fifteen inches, and eighteen inches, clear of the stalk supporting them. They have not developed into a panicle, nor, I should think, are they likely to do so. We have now (December 31st) had frost for a week, and yet the spikes are only slightly touched by it. These plants are to be seen on the south-east terrace of a house; the house coming between them and the Birkdale is a suburb of Southport, about seventeen miles from Liverpool, and on the shore of the Irish Sea.-H. M., Birkdale.

sea.

THE ANATOMY OF THE COCKROACH.-The authors of the most interesting and instructive papers upon the anatomy of the cockroach recently published in SCIENCE-GOSSIP would confer an additional favour upon your readers if they would describe the methods adopted by them in preparing the specimens from which their drawings were made.-7. H. Moorhead.

LION AND TIGER.-I should be glad if some zoologist would explain what appears to me a difficulty in natural history, and that is, placing the lion and tiger in the same genus (Felis), as they are so very dissimilar in many respects. The lion has a tuft on his tail. Mr. Dallas, in his Natural History, writes, "In the typical genus (Felis) the tail is much elongated, but destitute of a tuft, and the skin is almost always marked with stripes or spots." The tiger has retractile claws; lions have not. The cat family climbs trees-lions do not. The cats live in the woods, lions roam on the plains; besides, there are other differences between the two animals which will occur to your readers. I have talked this matter over with a sportsman, who was well acquainted with them in their native haunts, and shot many; he agrees with me that they should have a separate class. -S. A. Brenan, Cushendun.

RECENT SUGGESTIONS.-Two capital observations or suggestions have recently appeared in SCIENCEGOSSIP. One of these refers to the tide of bricks, mortar and plaster which is surging all around London, and which in its course threatens to so materialise the suburbs that scarcely any vestige of natural beauty or power will survive. Green fields, trees, wild flowers, &c., will rapidly disappear, and the wearied artisan, the rambler, the naturalist, will alike be deprived of their rural haunts of pleasure and instruction. Epping Forest has been preserved, thanks to the energy of some naturalist, or sportsman, I forget which; and now Highgate Wood with its flowers and birds, Hornsey with its pleasant landscapes and walks, Muswell Hill rich in the romance of geology, &c., are threatened with the inevitable. Even the very presence of houses in any considerable number seems deleterious to vegetation. During last summer I spent many weeks in Patterdale, perhaps the most retired and beautiful valley in all England, and I can amply testify to the lavish and beautiful efflorescence there to be seen. The wild roses, the campions, the fox-glove, the stitch-worts, the cranesbills, the wound-worts, the garlics, the burnets, &c., were exquisite in colour and of a larger size than those commonly known to townsfolk. The other suggestion, which I alluded to, refers to the establishment in a suitable part of London of a popular observatory. I understand that about ten years ago there did exist some sort of peep-show observatory some

where in or near the Euston Road. How it managed to go "down the hill," is more than I can say; but that it was not a very remunerative concern seems evinced by the fact that, to my knowledge at least, nothing of the sort has ever been established since. We all remember what a fine show there was at the Education Department of the Healtheries Exhibition. In a mechanical point it seemed almost perfect; but nevertheless it is true that the scientific culture of the English public mind has proceeded much slower than that of most foreign nations. We read that during the eclipse of October last, the French Government provided in the streets of Paris a number of telescopes for the gratuitous use of the public. When will the British Government be so far actuated by British public opinion or feeling, or whatever it be, as to act in a similar manner?-P. Quin Keegan, LL.D.

SEWAGE SCHEMES.-In SCIENCE - GOSSIP for September there is an article on sewage which reminds me of a plan which is adopted with great success in Copenhagen. It is merely this, that there is a division by which the liquid is run off from the house into the drains. There is nothing in the smell from the residue; in fact, I could not perceive any in a large hotel in Copenhagen. The ammonia from the liquid is by no means injurious to health; of this we have had ample experience in Smithfield. Of earth closets to make a slop as is done in earth closets, and then to put in earth to dry it up, seems a roundabout way to get rid of a nuisance. I have very little doubt, that (in crowded places especially) the Copenhagen plan will have to be adopted. Gas water contains considerably more ammonia than the liquid which is absorbed in the earth closets, and as this gas water is sold for less than a penny a gallon for heating sulphate of ammonia, such liquid as runs into the drains at Copenhagen is probably not worth attending to except in particular situations.J. G., Malvern.

A MUSICAL MOUSE.-One evening in the summer of 1883, I noticed a mouse making a peculiar noise in the sitting-room of my house. The noise resembled that made by a kettle just beginning to boil, or a sort of low whistle, and was very clear and distinct. This singing (?) power appeared to be under the control of the mouse, for as the little creature moved about in search of stray crumbs over the carpet, it ceased occasionally, and also when alarmed, as the animal hurried off. I observed the little visitor hundreds of times afterwards, and it always made the same (by no means unpleasant) noise, when out in the room foraging. After some months, however, it mysteriously disappeared without apparent reason. A friend of mine informs me that this "musical" power, though uncommon has been observed before, and is the result of some disease to which the animal must have succumbed. I have also been informed by others, that it is a natural peculiarity. Would any contributor to this Journal kindly give a true solution to the mystery, or particulars of similar cases that may have been observed ?-S. H. Veale.

BLACK RAT.-The black rat is still to be met with at most of the London docks, and, although it does not now occur so frequently as in years past, it can hardly be considered rare. The war of extermination carried on by the Norway or sewer rat against the black rat, means, that not only does it kill its victim but devours it too. A friend of mine employed at one of the docks, has occasionally found skins of freshly killed black rats, turned inside out, in various drawers, boxes, &c.; this seems to be the usual

process with rats. For experiment I have given the carcass of a white rat, to a black and white variety, and observed the same result-only a few bones of the head remaining attached to the skin.-F. W. Halfpenny.

NOTICES TO CORRESPONDENTS.

now

To CORRESPONDENTS AND EXCHANGERS.-As we publish SCIENCE-GOSSIP earlier than heretofore, we cannot possibly insert in the following number any communications which reach us later than the 8th of the previous month.

TO ANONYMOUS QUERISTS.-We receive so many queries which do not bear the writers' names that we are forced to adhere to our rule of not noticing them.

To DEALERS AND OTHERS.-We are always glad to treat dealers in natural history objects on the same fair and general ground as amateurs, in so far as the "exchanges" offered are fair exchanges. But it is evident that, when their offers are simply disguised advertisements, for the purpose of evading the cost of advertising, an advantage is taken of our gratuitous insertion of "exchanges" which cannot be tolerated.

WE request that all exchanges may be signed with name (or initials) and full address at the end.

VICAR.-The "Popular Science Review" is not now in existence. It has been defunct about five years.

Miss L.-We do not insert exchanges gratuitously in which the word "cash" occurs. Those are "sales," not "exchanges," and have to be paid for as advertisements.

J. ELLISON. Your shells are: 1. Anodonta anatina; 2. Unio pictorum; 3. Unio, sp. (?) (American); 4. U. tumidus; 5. Paludina vivipara; 6. Limnea auricularia.

G. SMITH AND OTHERS.-We will let our readers know concerning the proposed General Index in time. The last was published in 1876, price 8d. It included the contents of the first 12 volumes, and may be had of our publisher.

B.Sc.-Thanks for the interest you take in our journal, but we think it would be a mistake to leave out the botanical names in the description of plants, &c., and give only the trivial names. It would open the door to considerable inaccuracy and misunderstanding.

C. G. D. (Guernsey).-Your Coralline is a very fine specimen of the Polyzoon, Eschara foliacea, not uncommon in the deeper parts of the sea off our southern coasts.

G. T.-The last edition of Carpenter's "Microscope" was published in 1883. It is a fine work, and will fully serve your purpose, and answer every question relating to practical microscopic work.

J. E. C., jun. The last number of the Proceedings of the Geologists' Association was published in October, and may be had of E. Stanford, Charing Cross, price 1s. 6d.

J. M. B. TAYLOR.-Many thanks. All your notes will appear in due course.

W. J.J.-Rimmer's "Manual of Land and Fresh-water Shells" is the best. Nearly all the species are there photographed, price 10s. 6d. There is no regular work on the fossils of the chalk, but you will find a good deal about them in the various works of Dr. Mantell, ("Medals of Creation," 2 vols. ; "Geology of the Isle of Wight," &c.), or in "Our Common British Fossils, and where to find them," by J. E. Taylor, which will be published in March next.

ALCHEMIST.-Meldola's "Elementary Text Books on Chemistry," are among the best used in connection with the South Kensington Examination. They are cheap, and published by Murby & Co. Apply to Messrs. Churchill, publishers, for information respecting an elementary text-book on Medicine.

R. CONNOR.-No sketches of objects were enclosed in your letter. If you will send them we will do our best to identify

them.

A. SHAW.-We do not undertake to name foreign objects of Natural History. The shells shall be looked up and forwarded to you.

S. A. BRENAN.-The "fungoid growth was a species of Nostoc-the so-called "Witch's Butter." Specimens sent to be named are not returned. The one you forwarded us was in a state of high decay when it reached us.

EXCHANGES.

WALLROTH'S (Latin) Compendium Flore Germanicæ (1831), vol. iii., containing the rhizopterides, equisetum, ferns, lycopods, hepatica, mosses, and lichens, 654 pp., in strong pocket-book binding, to be exchanged for books or specimens illustrating the fungi.-W. B. Grove, 269 St. Vincent Street, Birmingham.

WANTED, SCIENCE-GOSSIP for February and March, 1884.-G. A. Grierson, 74 Market Place, Sheffield.

WANTED, to exchange with some one living in North Britain, mosses and hepaticæ from Gloucestershire. -E. J. Elliott, Middle Street, Stroud, Gloucestershire.

CEYLON insects, mainly lepidoptera, to exchange for other exotic lepidoptera or entomological micro. slides- Surgeon Clements, Army Medical Staff, care of P.M.O., Ceylon.

OFFERED, a geological collection of from eighty to a hundred well-selected and named specimens for good chemical balance; or what offers in books either on geology, botany, chemistry, or animal physiology?-J. T. Backland, 93 High Street, Paisley, N.B.

WHAT offers in dried plants for Ophioglossum Lusitanicum? -Apply, Free Museum, Paisley, N.B.

WANTED, bats, any others than the common, long-eared, or Daubenton's bats, either skins or in flesh, for palmated smooth newt (Lissotriton palmipes), in spirit.-J. T. Backland, 93 High Street, Paisley, N.B.

UNMOUNTED Spores of Equisetum arvense (very curious) for well-mounted slide or prepared material.-W. Sim, Gourdas, Fyvie, N.B.

DUPLICATES: L. stagnalis and P. corneus (very fine), L. peregra, P. complanatus, P. spirorbis, D. polymorpha, H. pi sana, H. lupicida, var. alba of H. virgata, H. caperata, H. arbustorum, H. ericetorum, H. rufescens, C. rugosa, &c.— Desiderata very numerous, land, freshwater, and marine shells; also algæ.-W. Hewett, 26 Clarence Street, York.

Humatopinus atini and other well-mounted slides in exchange for lantern photos or micro slides.-Dr. Moorhead, Errigle, Cootehill, Ireland.

EIGHTEEN packets of unmounted microscopic material sent in exchange for one well-mounted slide and stamp.-M. B., 9 Kirkdale, Sydenham, S. E.

A LARGE quantity of British and foreign shells, minerals, &c., in exchange for a small white wood microscopical cabinet, glass door required, to hold 144 slides.-M. B., 9 Kirkdale, Sydenham, S.E.

WANTED, English, silver, and copper coins, tokens, and medals; good exchange offered in fossils and other objects of natural history.-F. Stanley, Margate.

WANTED, well-mounted slides of eggs of insects, moth eggs preferred; first-class slides in exchange.-George Timmins, Syracuse, N.Y., U.S.A.

WANTED, October, 1868, number of "Anthropological Review," a fair price, or a copy of "A Few Words on Zoology," together with "A Short Account of Giraffe," by J. H. Garfit, given in exchange; also Vogt, "Lectures on Man," English translation, if not very expensive.-John H. Garfit, The Cairns, Boston, Lincolnshire.

DUPLICATES: Rhamni, Cardui, Atalanta, Tages, Selene, Tithonus, Adonis, Corydon, S. populi, Oculea, Ulmata, Chi, Bipunctaria, Festuca, Glyphica, Illumaria, Betularia, Comitata, Bucephala, Perla, Cæruleocephala, Menthastri, Auriflua. Desiderata: British birds' eggs, side blown, or butterflies and moths.-F. J. Rasell, 30 Argyle Street, S. James End, Northampton.

DUPLICATES: Io, Atalanta, Corydon, Cardamines, Linea, S. populi, Ligustri, Z. Trifolii, Potatoria, Bucephala, Betularia, Atomaria, Piniaria, Rhomboidaria, Perla, Instabilis, Cubicularis, Haworthii, Libatrix, Meticulosa, Oxycanthæ, Spadicea, Lota, Hybridalis, Cerella. Desiderata numerous. Accepted offers answered by return of post.-George Balding, Ruby Street, Wisbech.

BRITISH birds' eggs.-Duplicates: coot, moorhen, red-legged partridge, &c. Desiderata very numerous.-George Balding, Ruby Street, Wisbech.

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WANTED, odd back numbers of scientific periodicals: SCIENCEGossip, 'Nature," "Zoologist," "Journal of Conchology," &c. Will give in return a good series of British Shells.-S. C. Cockerell, 51 Woodstock Road, Bedford Park, Chiswick, W.

SHELLS for exchange: L. glutinosa, A. acicula, Z. excavatus, Bulla hydatis, Lit. neritoides, Physa acuta (from Kew Gardens), and many others. Wanted, Acme, Vertigo, and varieties of nemoralis, hortensis, &c.-S. C. Cockerell, 51 Woodstock Road, Bedford Park, Chiswick, W.

MICRO slides offered in exchange for scientific books and instruments.-Samuel M. Malcolmson, M.D., 55 Great Victoria Street, Belfast.

FOSSILS.-Over 400 specimens, miocene, eocene, chalk, lias, oolite, from Red Crag, Bognor, Barton Cliff, Shepton Mallet, Lyme Regis, and Portland; also a few mineral and rock specimens from Cornwall, in exchange for two pairs of canaries for breeding purposes, or Morriss's "British Birds."-T. Lawson, 9 Marshall Street, Golden Square, W.

OFFERS wanted in exchange for 240 birds' eggs, many varieties, both land and water birds.-Alfred Draper, Abbey Dale Road, Sheffield.

WANTED, microscopist's collecting case, net, &c.-A. Draper, 275 Abbey Dale Road, Sheffield.

WANTED, members for Botanical Evercirculator. Full particulars on application to-T. F. Uttley, 17 Brazennose Street, Albert Square, Manchester.

WANTED, back numbers of SCIENCE-GOSSIP, from commencement to present date, to complete volumes. Send list of spare numbers for exchange to-T. F. Uttley, 17 Brazennose Street, Albert Square, Manchester.

SCIENCE-GOSSIP, clean, 1882, 1883, 1884, plates of "Graphic Microscopy." What offers?-John Kitchin, Grosvenor Place, Upper Parliament Street, Nottingham.

SCIENCE-GOSSIP, 1880 (unbound and in good preservation), for good scientific (natural history) book of same value.-Arthur Ayling, Tarrant Street, Arundel, Sussex.

OFFERED," Scientific Recreations" (unbound and in excellent condition), for vols. ii. or iii. of "Science for All," or other good scientific books or periodicals.—Arthur Ayling, Tarrant Street, Arundel, Sussex.

WANTED, Continental plants in exchange for other Continental or English plants.-A. R. Waller, Low Ousegate, York. 1500 British moths (many rare), including 400 species, for exchange for a similar collection of British Coleoptera; also foreign butterflies for foreign Carabide and Longicornia.Delancey Dods, 47 Chepstow Place, Bayswater.

Most of the Longicornes and many of the Chrysomela and Geodephaga for exchange. Desiderata: marine shells, British and foreign. Lists sent.-G. Pullen, Free Library and Museum, Derby.

WANTED, fossils from Upper Miocene, Middle Eocene of France, Upper Miocene of Belgium and Germany, Solenhofen stone; also foreign land, marine, and freshwater shells. Offered, fossils and shells.-Miss Linter, Arragon Close, Twickenham.

POLARISCOPIC.-In exchange for any good micro photograph, I will forward a very beautiful slide of copper sulphate, showing circles on variegated ground.-Mathie, 42 McKinlay Street, Glasgow.

OFFERED, SCIENCE-GOSSIP for 1883, in clean separate copies; also with covers off for binding 1874 and 1875. Wanted, books on British Flora.-A. V., Mount Cottage, Red Hill, Surrey.

OFFERED, Black's "Three Feathers," 6s. edition, one vol. post free, for last number of "Popular Science Review," edited by Dallas, post free. Wanted, terms for this quarterly, secondhand, post free.-Vicar, Salcombe Regis, Sidmouth.

WANTED, to purchase a few specimens of flint implements (British).-F. Chams, 10 Broomfield Road, Chelmsford.

REPTILES in spirits, young crocodile, whip snake, viper, sea snakes, scorpion, centipede, &c., in exchange for flint and stone implements, or British birds' skins.-R. McAldowie, 12 St. Nicholas Street, Aberdeen.

GOOD specimens of British butterflies wanted in exchange for local British plants.-F. and C. Towndrow, 2 Commercial Buildings, Malvern Link.

WILL exchange a good selection of several hundred dried specimens of British plants, for restoration or Elizabethan dramas or poetry. Offers requested, silence negative.-W. Roberts, jun., Heamoor, Penzance, Cornwall.

OFFERED, "Illustrated Science Monthly," first two volumes, cost ros.; wanted, botanical or other slides, lepidoptera, pupæ, &c.-S. M. Wellwood, 320 Duke Street, Glasgow.

Pinnules of Neuropteris gigantea, from the coal measures of South Staffordshire, given in exchange for other fossils.-A. M., Martin's Hill House, Dudley.

WANTED, good material for mounting, more especially insects (in spirit); also a quantity of any one insect (providing it is not common); well-mounted slides given in exchange.-C. Collins, 25 St. Mary's Road, Harlesden, N.W.

MICROSCOPIC slides, by Watson & Son, to exchange for others of similar value.-A. P. Williamson, Chapel Alberton, Leeds.

"LONGMAN'S Magazine," vols. 1-4; "English Illustrated Magazine," vol. i. (both unbound); Cassell's "Illustrated Readings," (2 vols. bound in one); offered in exchange for fossils, corals, shells, &c.-H. L. E., 34 Ling Street, Liverpool.

BOOKS, ETC., RECEIVED.

"Authors and Their Works," by Rev. Dr. Brewer.-"The Magic Lantern and its Management," by T. C. Hepworth, (both from Chatto & Windus). "Midland Naturalist."-"Gentleman's Magazine." -"Belgravia.” - -"Science Monthly."-" "Ben Brierley's Journal."-"Science."-" American Naturalist."-" Canadian Entomologist."-" Medico-legal Journal of New York"-" American Monthly Microscopical Journal." -"The Botanical Gazette."-"Revue des deux Mondes."-"La Feuille des Jeunes Naturalistes."-" Cosmos.” &c. &c. &c.

COMMUNICATIONS RECEIVED UP TO 12TH ULT. FROM :— T. M. R.-G. T. G.-D. O.-J. D. H.-W. G. C.-W. R. P. -J. F.-W. R.-E. O. M.-J. C. M.-W. S.-J. R. B.E. G. H.-W. T.-H. M.-T. H. M.-W. D.-Dr. P. Q. K.E. W. O'M.-M. B.-J. E.-F. M.-F. S.-G. T.-J. H. G.C. S.-F. J. R.-W. R., jun.-S. A. B.-W. H. C.-S. R. S. M. M.-J. E. L.-T. F. W.-A. D.-W. W. B.-W. M. T. L.-J. M'C.-A. V.-F. C.-W. J. B.-A. C.—W. M.T. D. A. E.-S. C. C.-W. J. J.-R. McA.-J. G.-J. K. A. P. F. G.-W. H. P.-D. D.-G. B.-A. A.—A. Ř. W.— S. H. V.-G. P. H.-W. P. C. C.-J. W. B.-C. G. De.L. M.-J. B. M. T.-W. R.-A. M.-J. P. G.-H. W. L.F. and C. T.-F. W. H.-J. C. S.-A. W. F.-S. M. W. G. E. E.-G. S.-W. R. S.-W. T.-H. F.-H. W. M.-C. R. H. L. E.-J. E. C.-S. C. C.-A. P. W.-W. L. R. C.-&c.

HARDWICKE'S SCIENCE-GOSSIP.

xxi

The XIX. Army Medical Report on Water Filtration. "ANIMAL CHARCOAL.-When water which has been filtered through charcoal is stored for any time it soon begins to show evidence of low forms of life, and after a time a more or less abundant sediment of organisms becomes formed .. Occasionally it becomes distinctly offensive."

...

INORGANIC SUBSTANCES.-Of these the most important at present before the public is the SPONGY IRON. This is a very powerful filtering substance. The action of Spongy Iron is slow but complete; about twenty-two minutes is the time of exposure, and this is usually sufficient to purify all but very impure waters. The water filtered shows no tendency to favour the growth of low forms of life, and, may be stored with impunity.

Price Lists, Reports, Testimonials, etc., free.

SPONGY IRON DOMESTIC FILTER COMPANY, 22, New Oxford St., London, W.C.

Materials for Staining, Hardening, Injecting, and Mounting Microscopic Objects.

MOUNTED AND UNMOUNTED OBJECTS OF ALL KINDS.

LIVE OBJECTS FOR THE MICROSCOPE.
Lists on application to THE LABORATORY,

Ant Lion, Post-free 25.

CLAIRVILLE,

Parasite of Tortoise.
Post-free 1s. 3d.

ARCHWAY ROAD, UPPER HOLLOWAY, N. JUST PUBLISHED. Third Edition. Enlarged and greatly improved.

HOW TO USE OUR EYES,

AND

How to Preserve them from Infancy to Old Age, with Special Information about Spectacles. By JOHN BROWNING, F.R.A.S.

With FIFTY-TWO ILLUSTRATIONS, price 1s.; in cloth, 1s. 6d.

EXTRACTS FROM NOTICES OF THE FIRST EDITION.

"How to use our Eyes,' by John Browning, F.R.A.S., is a thoroughly practical little manual."-Graphic.

"Every one who cares about his eyesight should get this little book; those who think their eyesight of no particular moment can very readily dispense with it."-R. A. PROCTOR, B.A., in Knowledge. "Gives many a useful hint to those who enjoy good eyesight and wish to preserve it, and gives the advice of an oculist to those obliged to wear spectacles and whose eyes are in any way affected."-Pall Mall Gazette.

"We have been especially pleased with the many useful hints given by Mr. Browning regarding sight preservation.”—Health.
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BRISTOL HOUSE, HARLESDEN, N.W. (within Five minutes' walk of Willesden Junction). PREPARER OF MICROSCOPICAL SPECIALITIES, MOUNTED WITH OR WITHOUT PRESSURE. For full details of Series Nos. 1, 1A, and 2, see the December Number of Science-Gossip, page cxxx. New Series now in preparation. FULL DETAILED PROSPECTUS, WITH OPINIONS OF SCIENTIFIC PRESS, FREE ON APPLICATION. From CHARLES COLLINS'S intimate acquaintance with all branches of the Microscopical Trade, he respectfully solicits Microscopists to furnish him with particulars of their requirements in Microscopical Apparatus (new or secondhand), having facilities for procuring and supplying them on most advantageous terms. All Orders for Mounting Materials, Cements, Glass Slips, Thin Glass Circles, Cells (Tin or Glass), etc., executed with promptness. N.B.-Please Note Change of Address.

Crown Svo., cloth extra, with Illustrations, 6s.

LEISURE-TIME STUDIES, CHIEFLY BIOLOGICAL.

BY ANDREW WILSON, F. R. S. E.,

Lecturer on Zoology and Comparative Anatomy in the Edinburgh Medical School. Third Edition, with a new Preface. LONDON: CHATTO & WINDUS, PICCADILLY, W.

THE WANDERER'S LIBRARY.

Crown 8vo., cloth extra, 3s. 6d. each.

WANDERINGS IN PATAGONIA; or,
Life among the Ostrich Hunters. By JULIUS
BEERBOHM. Illustrated.

CAMP NOTES; Stories of Sport and
Adventure in Asia, Africa, and America. By
FREDERICK BOYLE.

SAVAGE LIFE. BY FREDerick Boyle.
MERRIE ENGLAND in the OLDEN
TIME. By George DaniEL. With Illustrations
by ROBERT CRUIKSHANK.

CIRCUS LIFE AND CIRCUS CELE-
BRITIES. BY THOMAS FROST.

THE LIVES OF THE CONJURORS.
BY THOMAS FROST.

THE OLD SHOWMEN and the OLD
LONDON FAIRS. BY THOMAS FROST.
LOW-LIFE DEEPS. An Account of the
Strange Fish to be found there. By JAMES

GREENWOOD.

THE WILDS OF LONDON. By JAMES

GREENWOOD.

TUNIS: The Land and the People. By the Chevalier DE HESSE-Wartegg. With 22 Illustrations.

THE LIFE AND ADVENTURES OF
A CHEAP JACK. By One of the Fraternity.
Edited by CHARLES HINDley.

THE WORLD BEHIND the SCENES.
By PERCY FITZGERALD.

TAVERN ANECDOTES and SAYINGS:
Including the Origin of Signs, and Reminiscences
connected with Taverns, Coffee Houses, Clubs, &c.
By CHARLES HINDLEY. With Illustrations.

THE GENIAL SHOWMAN; Life and
Adventures of Artemus Ward. By E. P. HINGSTON.
With a Frontispiece.

THE STORY of the LONDON PARKS.
By JACOB LARWOOD. With Illustrations.
LONDON

CHARACTERS. By HENRY

MAYHEW. Illustrated.

SEVEN GENERATIONS OF EXECUTIONERS: Memoirs of the Sanson Family (1688 to 1847). Edited by HENRY SANSON.

SUMMER CRUISING in the SOUTH SEAS. BY CHARLES WARREN STODDARD. Illustrated by WALLIS MACKAY.

LONDON: CHATTO AND WINDUS, PICCADILLY, W.

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