SCIENCE-GOSSIP. 



WATKINS AND DONCASTER, 



Naturalists and Manufactu rers of Entomologica l Apparatus and Cabinets. 



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



Patrons and Colleges, &c. Catalogue (66 pp.) sent post free on application. 

 Now ready— The Exchange List and Label List, Compiled by Ed. Meyrick, B.A., F.L.S., F.E.S., according 



to his recent "Handbook of British Lepidoptera." Exchange Lists, l£d. each, 8d. per doz., or 



4s. per 100. Label Lists, Is. 6d. each. 



Plain Ring Nets, Wire or Cans, including stick, 1/3, 3/-, 2/6 



Folding Nets, 3/6 and 4/- 



Umbrella Nets (self-acting), 71- 



Pocket Boxes, 6d. ; corked both sides, gd., 1/-, and 1/6. 



Zinc Relaxing Boxes, gd., i/-, 1/6, and 2/- 



Nested Chip Boxes, 4 dozen, 8d., i/g gross 



Entomological Pins, mixed, 1/6 per oz. 



Sngarlng Lanterns, 3/6 to 10/6 



Sngarlng Tin, with brush, 1/6, 2/- 



Sugaring Mixture, ready for use, 1/9 per tin 



Mite Destroyer (not dangerous to use), 1/6 per lb. 



Store Boxes, with Camphor Cells, 2/6, 4/-, 5/-, and 6/- 



Dltto, Book Pattern, 8/6, 9/6, and 10/6 

 Setting Boards, flat or oval, i-In-, 6d. ; ij-ln., Bd.\ ij-ln., gd. ; 



2-ln., zod. ; 2l-in., 1/-; 3-ln., 1/2; 34- ,n -, J /4 '< 4-' n -. 1/6 ; 



44-in., 1/8 ; 5-in., 1/10. Complete set of 14 boards, 10/6 

 Setting Houses, 9/6 and n/6 ; corked back, 14/- 

 Zinc Larva Boxes, gd., 1/- Brass Chloroform Bottle, 2/- 



Breeding Cage, 2/6, 4/-, 5/- and 7/6 



All Articles enumerated are kept in stock, and 



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



most useful Instruments for skinning, 10/6 

 Scalpels, 1/3 ; Label Lists of Birds' Eggs, 3d., ^d., 6d. 

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



Coleopterlst's Collecting Bottle, with tube, 1/6, 1/8 

 Botanical Cases, japanned double tin, 1/6, 2/9, 3/6, 4/6, 7/6 

 Botanical Paper, 1/1, 1/4, i/g and 3/3 per quire 

 Insect Cases, Imitation mahogany, 2/6 to 11/- 

 Cement for replacing Antennae, 6d. per bottle 

 Forceps for removing Insects, 1/6, 2/-, 2/6 per pair 

 Cabinet Cork, y x 3$, best qnality, 1/4 per dozen sheets 

 Pupa Diggers, in leather sheath, i/g. Insect Lens, 1/- to 8{- 



Glass Top and Glass Bottomed Boxes, from 1/4 per dozen 

 Label Lists of British Butterflies, ad. 



Ditto Land and Fresh- Water Shells, 24. 



Egg Drils, ad., id., 1/- ; Metal Blow-pipe, $d. & 6d. 

 Our New Label List of British Marco-Lepidoptera, with Latin and 

 English Names, 1/6. Our new Catalogue of British Lepidoptera 

 (every species numbered, 1/- ; or on one side for Labels, 2/ 

 can be sent immediately on receipt of order. 



The "DIXON" LAMP-NET i Invaluable for taking Moths of Street Lamps without climbing the lamp-posts, 2/6. 

 CABINETS. Special Show Room. 



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



,...,, tp„„- Minerals and Dried 



Eggs ' Plants. Fc sails, &o. 



4 Drawers 

 6 ,. 



Insect. 

 13/6 . 

 17/6 . 



Eggs. 



12/- 



16/6 



Minerals and Dried 

 Plants, Fossils, &c. 

 IO/6 



15/- 



8 Drawers., 

 io ,, 



33/- 

 45/- 



Eggs. 



3°/- 

 . 56/- 



*3/- 



45/" 



LARGE STOCK OF INSECTS AND BIRDS' EGGS. 



Birds, Mammals, &c, Preserved and Mounted by First-class workmen. 



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



SCIENCE-GOSSIP. 



BA CK N UMBERS {it ith a jew exceptions) from the beginning up 



to August, 1893, may be had from CHATTO & WINDUS, at a 



uniform charge of $d. each. 



Works by RICHARD A. PROCTOR. 



FLOWERS OF THE SKY. With 55 Illustrations. Crown 8vo, 

 cloth extra, 3s. 6d. 



EASY STAR LESSONS. With Star Maps for every Night in 

 the Year. Crown 8vo, cloth. 6s. 



FAMILIAR SCIENCE STUDIES. Crown 8vo, cloth extra, 6s. 



SATURN AND ITS SYSTEM. With 13 Steel Plates. Demy 

 8vo, cloth extra, 10s. 6d. 



MYSTERIES OF TIME AND SPACE. With numerous Illustra- 

 tions. Crown 8vo, cloth extra, 6s. 



THE UNIVERSE OF SUNS, etc. With numerous Illustrations. 

 Crown 8vo, cloth extra, 6s. 



WAGES AND WANTS OF SCIENCE WORKERS. Crown 

 8vo, is. 6d. 



By CAMILLE FLAMMARION. 

 POPULAR ASTRONOMY: A General Description of the 

 Heavens. Translated by J. Ellard Gore, F.R.A.S. With 

 Three Plates and 288 Illustrations. Medium 8vo, cloth, 10s. 6d. 



By A. RAMBOSSON. 



ASTRONOMY. With 10 Coloured Plates and 63 Woodcuts. 

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



By SIR DAVID BREWSTER. Post 8vo, cloth, 4s. 6d. each. 



MORE WORLDS THAN ONE : Creed of the Philosopher and 



Hope of the Christian. With Plates. 

 THE MARTYRS OF SCIENCE: Galileo, Tycho Brahe, and 



Kepler. With Portraits. 

 LETTERS ON NATURAL MAGIC. With numerous Illustrations. 



By MICHAEL FARADAY. Post 8vo, cloth, 4s. 6d. each. 



THE CHEMICAL HISTORY OF A CANDLE. Edited by 

 William Crookes, F.C.S. With numerous Illustrations. 



ON THE VARIOUS FORCES OF NATURE. Edited by William 

 Crookes, F.C.S. With Illustrations. 



London : CHATTO & WINDUS, in, St. Martin's Lane, W.C. 



ROSS' NEW 



' Industrial * 

 Microscope. 



Specially constructed for the use of Agri- 

 culturists, examination of Raw Materials, 

 Produce, Textile Fabrics, and direct 

 observations of every kind that do 

 not require oblique illumination or 

 special arrangements. 

 A Fine Adjustment may be added at any time, and Accessories 

 as per Catalogue. 



Piice with inclining limb, the choice of 1^ inch, 1 inch 

 or ^inch Objective, Eyepiece, Mirror, Rack Adjust- 

 ment, Substage Plate and Glass Dish ,£3 3 



Additional Objectives as named above each 12 



Fine Adjustment 1 1 



Iris Diaphragm, fitting stage 10 



Condensing Lens, fitting stage 5 



Double Nosepiece 15 



White wood case, stained 5 



Mahogany case 10 



Send for COMPLETE CATALOGUE of 



Microscopes, Telescopes, Photographic Lenses, 



Cameras, and Apparatus of all descriptions. 



GOLD MEDALS AND HIGHEST AWARDS AT ALL 

 GREAT EXHIBITIONS. 



ROSS, Ltd., Ill New Bond St, LONDON, W. 



Optical Works :— Clapham Common, S.W. 



Contractors to Her Majesty's Governments, British&> Colonial, 



also to the principal Foreign Governments. 



ESTABLISHED 1830. 



