SCIENCE- GOSSIP. 



MASON'S 



MICROSCOPI CAL SPE CIMENS. 



SERIES OF BOTANICAL SECTIONS. INSECT DISSEC- 

 TIONS or MISCELLANEOUS, Is. Id. List for Stamp. 



Many new Preparations in hand for coming Season. 

 Practical Hints on Mounting. (Copyright Pamphlet) 6d. 



R. G. MASON, 69 Park Rd., CLAPHAM, S.W. 



LIVING SPECIMENS FOR 

 THE MICROSCOPE. 



Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actino- 

 sphaerium, Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, 

 Melicerta, and many other Specimens of Pond Life. Price is. per 

 Tube. Post Free. Helix pomatia, Astacus, Amphioxus, Rana, 

 Anodon, &c, for Dissection purposes. 



THOMAS BOLTON, 



25 BALSALL HEATH ROAD, BIRMINGHAM. 



MARINE BIOLOGICAL ASSOCIATION OF 

 THE UNITED KINGDOM. 



THE LABORATORY, PLYMOUTH. 



The following Animals can always be supplied either living or 

 preserved by the best methods : — 



Sycon ; Clava, Obelia, Sertularia ; Actinia, Tealia, Caryophyllia, 

 Alcyonium ; Hormiphoria (preserved) ; Leptoplana ; Lineus, 

 Amphiporus ; Nereis Aphrodite, Arenicola, Lanice, Terebella ; 

 Lepas, Balanus, Gammarus, Ligia, Mysis, Nebalia, Carcinus ; 

 Patella, Buccinum, Eledone, Pecten ; Bugula, Crisia, Perdicellina ; 

 Holothuria, Asterias, Echinus ; Ascidia, Salpa (preserved), Scyllium, 

 Raia, etc., etc. For Prices- and more detailed Lists apply to 



The Director, Biological Labo ratory, Plymouth. 



CHANGE OF ADDRESS. 

 W. F. H. ROSENBERG, F.Z.S., begs to 



announce that he has removed from 

 48a CHARING- CROSS ROAD, W.C., 



TO 



57 HAVERSTOCK HILL, LONDON", K"."W., 



where all orders will receive prompt attention. 



All kinds of Natural History Apparatus kept in stock. 



'Mf Price List of British Lepidoptera post free. 



BROWNING'S 



PLATYSGOPIC LENS. 



WITH LARGER ANGLES, INCREASE*) FIELD, AND 

 IMPROVED DEFINITION. 



Engraved Real Size. 



AN ACHROMATIC COMBINATION, 



Combining the Definition of a Microscope with the 

 Portability of a Pocket Lens. 



I "If you carry a small Platyscopic Pocket Lens (which 

 every observer of Nature ought to do)." — Grant Allen, in 

 ,_— . j Knowledge. 



}• | "I have long carried one of these instruments and found 



I it invaluable." - John T. Carrington, Editor of Science- 



\ Gossip. 



The Platyscopic Lens is invaluable to botanists, mineralogists, 



or entomologists, as it focuses about three times as far from the 



object as the Coddington Lens, and has a field unequalled for 



flatness, allowing opaque objects to be examined easily. 



It is made in four degrees of power, magnifying respectively io, 

 IS, 20, and 30 diams. '; the lowest power, having the largest field, is 

 the best adapted for general use. 



Mounted in Tortoiseshell, magnifying 10, 15, 20, 

 or 30 diameters, either power 



In Niekelised German Silver, either power 



Combinations of any two powers, in Tortoise- 

 shell 



Combinations of any two powers, in Niekelised 

 German Silver -- .. 



s. d. 

 15 

 17 6 



27 6 



32 6 



Illustrated description sent free. 



JOHN BROWING, 63 STRAND, LONDON, W.C. 



WATKINS & DONCASTER, 



NATURALISTS and MANUFACTURERS OF CABINETS and APPARATUS for 

 ENTOMOLOGY, BIRDS' EGOS and SKINS, and all branches of Natural History. 



N.B. — For Excellence and Superiority of Cabinets and Apparatus, references are permitted to distinguished 



Patrons, Museums, Colleges, &*c. 



Mf* Our New Catalogue (96 pages) may be had post free on application. 



Plain Ring Nets, Wire or Cane, including stick, is. 3d., 2s., 2s. 6d. 



Folding Nets, 3s. 6d. and 4s. 



Umbrella Nets (self-acting), 7s. 



Pocket Boxes, 6d. ; corked both sides, gd., is. and is. 6d. 



Zinc Relaxing Boxes, od., is., is. 6d. and 2s. 



Nested Chip Boxes, 4 dozen, 7d., is. 6d. gross. 



Entomological Pins, mixed, is., is. 6d. per oz. 



Sugaring Lanterns, 2s. 6d. to 8s. 



Sugaring Tins, with brush, is. 6d., 2s. 



Sugaring Mixture, ready for use, is. gd. per tin. 



Mite Destroyer (not dangerous to use), is. 6d. per lb. 



Store Boxes, with Camphor Cells, 2s. 6d., 4s., 5s. and 6s. 



Ditto, Book Pattern, 8s. 6d., gs. 6d. and 10s. 6d. 

 Setting Boards, flat or oval, 1 in., 6d. ; i$ in., 8d. ; ij in., gd. ; 2 in., 



iod. ; z\ in., is. ; 3 in., is. 2d. ; 34 in., is. 4d. ; 4 in., is. 6d. ; 



4^ in., is. 8d. ; 5 in., is. iod. Complete set of 14 boards, 10s. 6d. 

 Setting Houses, gs. 6d. and us. 6d. ; corked back, 14s. 

 Zinc Larva Boxes, gd., is. Brass Chloroform Bottle, 2s. 6d. 

 Breeding Cages, 2s. 6d., 4s., 5s. and 7s. 6d. 



Taxidermist's Companion, i.e. a pocket leather case containing 



most useful instruments for skinning, 10s. 6d. 

 Scalpels, is. 3d. ; Label Lists of Birds' Eggs, 2d., 3d., 6d. 

 Scissors, per pair, 2s. Setting Needles, 3d. and 6d. per box. 

 Coleopterist's Collecting Bottle, with tube, is. 6d., is. 8d. 

 Botanical Cases, japanned double tin, is. 6d., 2s. gd., 3s. 6d., 4s. 6d., 

 Botanical Paper, is. id., is. 4d., is. gd., & 2s. 2d. per quire. [7s. 6d. 

 Insect Cases, imitation mahogany, 2s. 6d. to us. 

 Cement for replacing antennas, 4<i. per bottle. 

 Forceps for removing insects, is. 6d., 2s., 2s. 6d. per pair. 

 Cabinet Cork, 7 by 3$, best quality, is. 4d. per dozen sheets. 

 Pupa Diggers, in leather sheath, is. gd. Insect Lens, is. to 8s. 

 Glass Topped and Glass Bottomed Boxes, from is. per dozen. 

 Label Lists of British Butterflies, 2d. 



Ditto Land and Fresh-Water Shells, 2d. 



Egg Drills, 2d., 3d., gd. ; Metal Blow Pipe, 4d. and 6d. 

 Our new Label List of British Macro-Lepidoptera, with Lai 



English Names, is. 6d. Our new Catalogue of British 1 ,1 



ptera, every species numbered, is. ; or on one side for Labels, : 

 A II articles enumerated are kept in stock, and can be sent immediately on receipt of order. 



The " DIXON " LAMP NET (invaluable for taking Moths off Street Lamps without climbing the lamp-posts), 



recently much improved, 3s. 6d. 



CABINETS. 



Special Show Room. 



The following are the prices of a few of the smaller sizes ; for measurements and larger sizes see catalogue. 



!„„„. i?o-r,o Minerals and Dried , ^ Minerals and Dried 



Insect. Eggs. p , antSj j^.^ &c _ , Insect. Eggs. p , antS) Fossi , S| &c 



4 Drawers 13s. 6d 12s. od 10s. 6d. j 8 Drawers 33s 30s 25s. 



6 Drawers 17s. 6d 16s. 6d 15s. od. j 10 Drawers 45s 56s 45s. 



A LARGE STOCK OF INSECTS, BIRDS' EGGS AND SKINS. 



Birds, Mammals, &c, Preserved and Mounted by First-class Workmen true to Nature. 

 9W All Books and Publications on Natural History supplied. 



36 STRAND, W.C. (Five Doors from Charing Cross). 



