« AnteriorContinuar »
(TWENTY YEARS WITH E. WHEELER.) E. H. begs to inform his friends and the Scientific World that he has commenced business at the above address, and from his long experience with Mr. WHEELER, he will be enabled to submit to their notice a choice selection of newly-mounted Objects in all branches of Nature at the lowest prices.
LORD 8. G. OSBORNE'S DIATOMESCOPE, Post-free, 12s.
See “ English Mechanic,” August 22nd, page 561.
Geologists' Hammers, &c.
CLOSE TO THE NEW GÉNERAL POST OFFICE.
MICROSCOPICAL SPECIALITIES, ILLUSTRATING THE GROWTH, REPRODUCTION, AND STRUCTURE OF PLANTS. Diatoms mounted in monobromide of Naphthaline .... 1/- and 1/8 each. | Vaucheria in fruit, Batrachospermum and 1/- per slide. Pollen grain of Enothera emitting tube ................ 1/1 each.
Pediastrum ... V.S. of Fertilized Ovule of Mallow ....
Spirogyra in conjugation, stained and mounted T.S. of Stem and Leaf of Nepenthes, double-stained .... 1/3 ,
without contraction ..................... 1/6 Specially prepared illustrations of Sachs' and Thome's Textbooks of Botany, being copies of Figures in those works. All Post-free.] - CHAS. V. SMITH, CARMARTHEN. (Lists on Application.
SECOND-HAND MICROSCOPES AND OBJECTIVES. A large assortment by ROSS, BECK, COLLINS, SWIFT, and other first-class Makers, on Sale, very cheap.
MICROSCOPIO OBJECTS in great variety. Spécialité Physiological and Pathological Tissues. 500 SECOND-HAND PHOTOGRAPHIC LENSES AND CAMERAS By ROSS, DALLMEYER, TENCH, VOIGTLÄNDER, and all other esteemed Makers. The Cheapest and Best Stock in Londor.
New Catalogues gratis on application. Purchases and Exchanges made. Instruments Repaired and Relacquered. SANDS & HUNTER, 20, CRANBOURNE STREET, LONDON.
THE MARSH FLY.
the Polariscope or Parabo-
This Insect is without doubt one of the most beautiful when examined under polarised light. Every muscle can be distinctly seen in the head, tongue, thorax, abdomen and legs, besides showing the striated muscular fibres,
Very convenient and portable, gives ample Illumination, has all necessary adjustments, is provided with a Cylindrical Case, and can be conveniently carried in the breast coat pocket; when charged
with sufficient Oil to burn for above 31 hours, weighs under 12 oz. Price 8s. 6d. Microscopists who are in the habit of exhibiting at the Meetings of their respective Societies and elsewhere,
should provide themselves with this little Lamp. MICRO-PETROLOGY, TYPICAL ROCK SECTIONS, 1/6 AND 2/- EACH. JAMES HOW & Co., 73, FARRINGDON STREET, LONDON. Sole Maker of the Registered
MAGIC LANTERN & SLIDES BRIDGEMAN TRIPLE LANTERN ;
FOR PRESENTS, the Portable LUKE BI-UNIAL;
From 7s. Ed.
Dissolving View Mr. MALDON'S TRIPLE LANTERN, LANTERNS. used by him nightly with great
NEW SLIDES. success.
New Illustrated SPECIAL SHOW ROOM,
Catalogue Gratis, 406, STRAND.
post-free to all Five Hundred Slides, illuminated
parts. by gas, for Selection.
J. H. STEWARD, 406 & 66 STRAND, 456 WEST STRAND, 54 CORNHILL, LONDON. WATKINS AND DONCASTER, Naturalists and Manufacturers of Entomological Apparatus and Cabinets.
N.B.–For Excellence and Superiority of Cabinets and Apparatus, references are permitted to
distinguished Patrons and Colleges, &C. Plain Ring Nets, Wire or Cane, including stick, ale.
Breeding Cage, 2/6, 3/-, and 10/6. Folding Nets, 4/6 and 5/6.
Ditto, New Style for keeping the plant food fresh for a longer Umbrella Nets, 5/6 and 8/- (self-acting).
c. period, - and 7/6. Pocket Boxes, -76; corked both sides, -79, 1/-, and 1/6.
Coleopterist's Collecting Bottle, with tube, 1/6. Zinc Relaxing Boxes, 1/6, al-, and 3/-:
Ditto, Tin Boxes, 2/6. Ditto, large size, with strap, 6/6.
Ditto, Japanned Pocket Case, fitted with 26 tubes, 5/.. Nested Chip Boxes, 4 dozen, -/9. .
(black). Botanical Cases, japanned, double tin, 1/6, 47, 57, 67,9/. Entomological Pins, assorted or mixed, 1/- per oz. (white or Botanical Paper, 171, 1/4, 1/9, and a/a per quire. (Too heavy Glass Killing Bottles or Tubes ready for use, ils, 1/6.
for post.) Pocket Lanterns, 2/6 to 7/6.
Insect Cases, imitation mahogany, 3/6 to 11/-. Sugaring Tin, with brush, 2/6.
[box. Cement for replacing Antenna, -76 per bottle. Mite Destroyer (not inflammable nor dangerous to use), 1/- per Forceps for removing Insects, 2/6 per pair. (Supplied to Store Boxes, 2/6, 47- 5/5, and 6/-.
Collectors all over the world.) Ditto, Book Pattern, 8/6, 9/6, and 10/6.
Cabinet Cork, 7 X 3t, best quality, 1/4 per dozen sheets. Setting Boards, flat or oval, 1-in., -76; it-in.-/8; xf-in., -/9 Pupa Diggers, 2/-. Insect Lens, 1/6 to 7/6.
z-in., -/10; at-in. 1/-; 3-in., 1)2; 3t-in., 1/4; 4-in., :/6; Glass Top Boxes, per dozen, 1/8, 2/, 2/6.
4t-in., 1/8; 5-in., 1/10. Complete set of 14 boards, 10/6. Egg Drills, -/3. Setting Houses, 9/6 and 11/6; corked back, 14/6.
Metal Blow-pipes, -/8. Zinc Larva Boxes, 1/5, 1/6, and 2/-, flat or oval.
| Setting Needles, 6d. per box. All Articles enumerated are kept in stock, and can be sent immediately on receipt of order. For Sale, a large Assortment of Ova and Pupæ of both British and Foreign Butterflies and Moths.
CABINETS.-Special Show Room. The following are the prices of a fow of smallor sizos; for moasurements and larger sizes 808 Cataloguo (48 pp.)
Minerals and Dried
Eggs. Plants, Fossils, &c. 4 Drawers .... 14/• .. .. 12/6 .. .. 10/6
8 Drawers .. .. 32/• .. .. 30/• ... 23/6 „ .. .. 18/- .... 16/6 ... 15/ 1 10 „ ... 48/2 ... 42/.... 40/A LARGE STOCK OF INSECTS AND BIRDS' EGGS.
Birds, Mammals, &C., Preserved and Mounted by First-class workmen.
and Dissolving Views, &c.
onsert meile hools or Lectures
Phantasmagoria Lantern, with 3t-inch Condenser, will show a disc 10 feet in
diameter, with Fountain Solar Argand Lamp, suitable for Schools or Lecturers,
£2 17s. 6d. Pair of Ditto, arranged for Dissolving Views, in Case, complete, £7. A New Portable Lantern, Burning Paraffine Oil, with Patent Double Wick Lamp and 31-in. Condenser, £3 3s. Od., or with Triple Wick, £3 8s. Od.
PHOTOGRAPHED SLIDES FOR THE ABOVE.
Moving Slide and Chromotrope, from 15s. to 40s.
CATALOGUES FREE BY POST.
MICRO-SLIDES FOR SCIENCE CLASSES.
Mr. PIFFARD'S PATENT COUNTER-SUNK SLIPS are now on Sale.
Two sizes are ready, 3-16 and 5-8, at 6s. per dozen. They are thus described in the Journal of the Royal Microscopical Society, August, 1884 “PIFFARD'S SLIDES.-Mr. B. Piffard has patented a slide, which is made by forming with a diamond a round recess in an ordinary slide. In this the object is placed, and covered with thin glass. The upper surface of the slide is thus perfectly smooth, the cover-glass being even with the slide. There is no danger of the cover-glass and object being knocked off; and the recess causes a very beautiful diffusion of light.”
REMITTANCE WITH ORDER. ENLARGED CATALOGUE READY, POST FREE. B. PIFFARD, Hill House, Hemel Hempstead, Herts.
Possessing all the Properties of the finest Arrowroot, BROWN AND POLSON'S CORN FLOUR
Is a Household Requisite of Constant Utility FOR THE NURSERY, THE FAMILY TABLE, AND THE SICK ROOM. NOTE.-Unlike many others, this Corn Flour bears the Name of its Manufacturers, who offer the
guarantee of their long-established reputation for its uniformly Superior Quality.
"" "" "" " ... ... £3,491,376
Annual Income ... ... ... ... ... ... .. .. ... ... £685,369 Moderate Rates of Premium, Liberal Scale of Annuities. Loans granted upon Security of Freehold, Copyhold, and Leasehold Property, Life Interests, and Reversions; also to Corporate and other Public Bodies, upon Security of Rates, &c.
BONUS YEAR, 1885. POLICIES effected before the ist July 1885 on the profit tables, with annua! premiunus, will participate in the Bonus to be declared next year, in the manner prescribed by the regulations of the Society.
JOSEPH ALLEN, Secretary, Prospectus, Reports, and Proposal Forms can be obtained on application to the Society's Agents and Branch Offices, or to
JOSEPH ALLEN, Secretary.
NORTH BRITISH AND MERCANTILE INSURANCE COMPANY
INCORPORATED BY ROYAL CHARTER AND SPECIAL ACTS OF PARLIAMENT. Authorised Capital, £3,000,000. Subscribed Capital, £2,500,000. Paid-up Capital, £625,000. Chairman-JOHN WHITE CATER, Eso.
Deputy-Chairman-CHARLES MORRISON, Eso. Manager of Fire Department-G. H. BURNETT.
Manager of Life Department and Actuary-HENRY COCKBURN. Foreign Sub-Manager PHILIP WINSOR.
Secretary-F. W. Lance.
• FIRE DEPARTMENT. The Net FIRE FUNDS, irrespective of the Paid-up Capital, now amount to £1,592,235 5s. 2d.
LIFE DEPARTMENT. The LIFE FUND now amounts to £3.340,918 11s. 2d. The ANNUITY FUND now amounts to £500,275 178. 11d. THE PRINCIPLES on which this Company is conducted combine the system of Mutual Assurance with the safety 1 of a large Protecting Capital and Accumulaied Funds, and thus afford all the facilities and advantages which can prudently be offered by any Life Assurance Office.
NIVETY PER CENT. of the WHOLE PROFITS is divided among the Assurers on the Participating Scale. The PROFITS are divided every Five Years. POLICIES are INDISPUTABLE after Five Years. ANNUITIES of all kinds ar
e granted. Prospectuses and every Information can be obtained at the Chief OfficesLONDON : 61, THREADNEEDLE ST., E.C. WEST END OFFICE, 8, WATERLOO PLACE, S.W. EDINBURGH, 64, PRINCES ST.
BRITISH EMPIRE MUTUAL
LIFE ASSURANCE COMPANY,
NEW BRIDGE STREET, LONDON, E.C. Incorporated under Act 7 & 8 Vict. cap. 110, and further empowered by Special Act, 15 Vict. cap. 53.
I J. H. TROUNCER, M.D., Lond., Deputy-Chairman.
GEORGE PHILLIPS, Esq. Hugh CAMPBELL, M.D.
PEARSON Hill, Esq.
GEORGE ROOKE, Esq. ROBERT FREEMAN, Esq.
DONALD MUNRO, Esq.
John E. TRESIDDER, Esq. WILLIAM Henry Wills, Esq., M.P. Accumulated Fund, 1883, nearly £1,000,000 | Profits already Divided .. .. £847,000 Annual Income, 1883 ... ... ... £184.101 | Claims Paid to 31st Dec, 1883 £1,166,027 Policies in force ... ... ... £4,434,661.
EDWIN BOWLEY, F.I.A., F.S.S., Secretary.
PREPARATIONS for the MICROSCOPE. NEW SLIDES WORTHY SPECIAL ATTENTION.
W. WATSON & SONS having purchased the
Business of Mr. E. WHEELER, Late of Tollington Type Slide Diatomaceæ. 100 different kinds, all named . 21s.
Road, Holloway, including between 40,000 and 50,000 Type Slide Foramenifera. 19 different kinds, all named · 12s.
choice specimens, are enabled to offer an unequalled. Most beautiful and elaborate arranged Slides of Diatoms, Anchors and Plates of Synapta, Wheels of Chirodota,
selection of objects of interest. &c. For dark ground illumination these are unequalled, each . . . . . . . . 7s. 6d., 10s., 16s., 21s.
JUST PUBLISHED, Diseased Lung from Coal Miner, Chimney Sweep, Saw
(to include Mr. WHEELER's Stock) Grinder, Cin Drinker, Effects of London Smoke,
New Classified List of Objects for the each . . . . . . . . . . . . . ls. 9d. Jaw of Mole, Horizontal Section. Through all the teeth
Microscope. in situ . . . . . . . . . . . . . . . Os. Illustrated Catalogue of Microscopes and Human Scalp. Double Stained Vertical or Horizontal
Apparatus. Sections, each . . . . . . . .
. . ls. 9d. Any of the above forwarded on receipt of remittance, and
Either of the above forwarded post-free to any part of exchanged if not approved.
the world on application. W. WATSON & SONS, 313, HIGH HOLBORN, LONDON. OPTICIANS TO HER MAJESTY'S GOVERNMENT.
N reference to the se- | general appearance, a British fresh-water spider-mite,
ries of twelve Plates of the Order Acarina, and Family Hydrachnea, of
The specimen figured is an elegant and lively dents for valuable individual of a form commonly met with : Eylaïs, so information. designated from collation with published description ; chiefly relating to the writer, however, was fortunate in the proof of the minute details of plate having been seen by Mr. C. F. George of structure, and Kirton in Lindsey, whose articles in this journal, on nomenclature; these particular organisms, commencing Sept., 1882, and to reply to continued at intervals until August 1883, and illussuggestions, trated with woodcuts "of scientific importance and worthy of consid accuracy, establish a basis of valuable authority on eration, which, if the subject; the number of the eyes in these minute accepted (in some creatures appears to be a matter of important obserinstances), would vation, and, as Mr. George remarks, their singular advance the selec peculiarity and arrangement cannot be overlooked.
tion of subjects In the drawing, their position is only indicated; beyond the scope of “popularity” into the detail would have demanded an amplification so region of biological research. With low powers, expansive as to have taken the subject beyond the and special illumination seeking picturesque effects, scope of a general view of the entire creature ; under many deep and important peculiarities, possibly deeper examination, four eyes are discovered in pairs, bearing upon classification, necessarily cannot be upon the dorsal surface of the cephalothorax, apdetailed or even exhibited ; and to enter into intri proximating so closely that each pair is seemingly cacies of structure, with higher objectives (as has combined in one; even in such minute Acarina these been proposed), would far outstrip the motive of organs possess an ocular power superior to those of the work; it may therefore be desirable to repeat that insects, and often the appearance of a solitary eye the raison d'être of “ Graphic Microscopy” is to en under closer examination is found to be what has courage the observations of our younger subscribers, been happily termed “helved,” the eye projecting on in presenting them with an attractive and accurate two rounded semi-circles, reniform, a fusion of two picture of a distinct subject : simple, popular, easily stemmata ; a divided eye ball. Such a minute condiprocurable, and susceptible of artistic treatment. tion could not have been shown in a field involving
The present example, drawn from life, under the general aspect of the upper and under sides of the moderate amplification, necessarily screening specific same individual, but it is a peculiarity of significant character (the same individual furnishing the dorsal | importance in the decision of species, and upon this and ventral aspect), fairly represents in form and point (apart from the portraiture of the specimen), Mr.
No. 241.- JANUARY 1885.