SCIENCE- G OSSIP. 



MASON'S 



MICROSCOPICAL SPECIMENS. 



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. 



THOIMLRSS BOLTON, 



25 BALSALL HEATH ROAD, BIRMINGHAM. 



MICROSCOPES AND APPARATUS. 



Outfits for Bacteriology and General Microscopy from £4 10s. 

 upwards. Our Grand Model at £10 10s is the most up-to-date 

 outfit at an extremely moderate price. It comprises large Model 

 Stand, Spiral Rack and Pinion, our " Perfection " fine adjustment 

 Swing Substage with Rack and Pinion Movements, Iris Dia- 

 phragm, Abbe Condenser, No. 4 Eyepiece, Plane and Concave 

 Mirrors, 3rd, Jth, and t^'h Oil Immersion, 1-30 n.a., fitted in 

 Mahogany case, £10 10s. Dust-proof Triple Nosepitce, 15/6. 

 New Triple Achromatic Magnifiers, long focus and enormous 

 flat field, in neat Brass or Nickel Cases (powers — 10, 15, 20 or 

 30), 10/6 each. 



Special Lenses and Instruments of all kinds made to order. 



GOWLLAND «& CO., 



OPTICAL WOIRTdS, 

 Selsey, Sussex; and Philadelphia, U.S.A. 



BROWNING'S 



PLATYSCOPIG LENS. 



WITH LARGER ANGLES, INCREASED FIELD, AND 

 IMPROVED DEFINITION. 



Engraved Real Size- 



AN ACHROMATIC COMBINATION, 



Combining the Definition of a Microscope with the 

 Portability of a Pocket Lens. 



" If you carry a small Platyscopic Pocket Lens (which 

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

 , Knowledge. 



1 "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 bctanists, 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, 

 15, 20, and 3odiams. ; the lowest power, having the largest field, is 

 the best adapted for general use. 



Mounted in Tortoiseshell, magnifying 10, 15, 20, 

 op 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 .. .. 



j. d. 

 15 

 17 6 



27 6 



32 6 



Illustrated description sent free. 



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



WATKIN5 & DONCASTER, 



NATURALISTS and MANUFACTURERS OF CABINETS and APPARATUS for 

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



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



Patrons, Museums, Colleges, &*c. 

 HU^ 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 Nels (self-acting), 7s. 



Pocket Boxes, 6d. ; corked both sides, od., 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. od. 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., 9s. 6d. and 16s. 6d. 

 Setting Boards, flat or oval, 1 in., 6d. ; ijt in., 8d. ; if in., od. ; 2 in., 



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



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

 Setting Houses, 9s. 6d. and us. 6d. ; corked back,' 14s. 

 Zinc Larva Boxes, 9d., 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 od. 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. 9d., & 2s. 2d. per quire. [7s. 6d. 

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

 Cement for replacing antennae, 4d. 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. 9d. 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., 9d. ; Metal Blow Pipe, 4d. and 6d. 

 Our new Label List of British Macro-Lepidoptera, with Latin and 

 Our new Catalogue of British Lepido- 



English Names, is. 6d 



ptera, every species numbered, is. ; or on one side for Labels, 2s 

 All 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. 



4 Drawers 13s. 6d 



6 Drawers 17s. 6d 



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



i,„,„,., I?™* Minerals and Dried . ~ Minerals and Dried 



Plants, Fossils, &c. Insect ' E ^ s - Plants, Fossils, &c. 



.... 10s. 6d. 3 Drawers 33s 30s 25s. 



.... 15s. od. 10 Drawers 45s 56s 45s. 



Eggs. 



12s. od. 

 16s. 6d. 



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



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

 {V All Books and Publications on Natural History supplied. 



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



