SCIENCE-GOSSIP. 



No. 54.— Stand, Iris diaphragm No. 55.— Stand, Iris diaphragm No. 56.— Stand, Iris diaphragm No. 57.— Stand, Iris diaphragm 

 and mahogany case, and mahogany case, and mahogany case, and mahogany case 



£2 11s. 6d. £3 12s. 6d. £4 7s. 6d. ;£5 12s. 6d. ' 



New One-twelfth Inch Oil Immersion Object Glass, N - A ro £4. 



FMF StiSUSIS am R. & **• BECK, Ltd,, 68, Cornhill, London, 



i.C. 



Now ready, price One Penny, and Postage One Halfpenny 

 for every four copies. 



LIST OF THE 

 LAND-SHELLS AND THEIR 



To which is added the Band-formulas of Helix nemoralis and 



H. hortensis. Will also serve as an exchange list. 

 Apply Editorial Department, Science-Gossip, i, Northumber- 

 land Avenue, London, W.C. 



STEVENS 5 AUCTION ROOMS, 



INCLUDING ALL KINDS OF 



Optical and Photographic Apparatus, Electricals, 



Mathematical, Surgical and 



Musical Instruments, and Miscellaneous Property 



of every description, 



EVERY FRIDAY. 



Cases for Binding "SCIENCE-GOSSIP' 



VOLS. I 



Price Is. each. 



II., in. & IV. 

 Post Free Is. 2d. 



86, 



TO BE OBTAINED OF THE PUBLISHERS, 



ST. MARTIN'S LANE, LONDON, W.C. 



MAGIG_LANTERNS. 



NO SMELL. NO SMOKE. NO BROKEN GLASSES. 



9RAND 



RESULTS. 



THE MARVELLOUS 



ONCE AND TWICE A MONTH. 



MR. J. C. STEVENS 



Begs to call attention to his Sales of the above at 

 his Great Rooms, 38, King Street, Covent Garden, 

 at 12.30 every Friday. 



Goods received at any time, and included in these Sales. 



LOUIS'S M ICROSCOPICAL OBJECTS. 



24 Series, Unmounted, of Cleaned Diatoms, 12 tubes in each 

 Series, 4s. per Series. 5 Series of 24 Foraminiferous Sands at 2s. 

 each. 5 Series of 24 Microfungi at zs. each. 7 Series of 24 

 Sections of Woods, 2s. each. 



B 

 ■ 



Cleaned Unmounted Diatoms. 



Series xii. — 4s. per 12 tubes. 

 Modena (Italy). 

 Plearosigma angulatum. 

 Pitruame grande (Mexico). 

 Surirella gemma. 

 Estuaire de la Ranee (France). 

 Newcastle (Barbados). 

 Pornic pelagique (France). 

 Cwra Bychan (Wales). 

 Godefrey's Bog (Mass., U.S.A.), 

 Tabellaria flocculosa. 

 Meridion circulare. 

 La Guadeloupe. 



Foraminiferous Sands Unmounted. 



Series xli. — 4s. per 24 packets. 

 Mauritius. 

 Aden. 

 India. 

 Montereau. 

 Java. 

 Sicily. 

 Paris basin. 

 Cherbourg. 

 Cyprus. 

 Beauchamp. 

 Maestricht. 

 etc., etc. 



W. WEST, 15, HORTON LANE, BRADFORD. 

 Send stamp for list. 



MARVELLOUS PAMPHENGOS.— The finest Oil-lighted Lan- 

 tern extant ; equals Limelight ; stood the test against all 

 Imitations. Over 3,000 sold— supplied to the Government and 

 School Boards. Particulars free. The Universal Lantern, 

 ■inch double Condensers, Portrait Lenses, Rack and Pinion, 

 our-wick Lamp, reduced to 18s. 6d. 



GILCHRIST SCIENCE LANTERN.— Qxyhydrogen Micro- 

 scopes, Polarlscopes, &c. The Cinematograph for Living 



ELEGANT MAHOGANY BIUNIAL, brass fronts, £6 10s. ; 

 blow-through Safety Jets, 8s. 6d. ; mixed Gas Jet, 12s. 6d. Mr, 

 Hughes's Grandly Illustrated Catalogue, over 160 Original Wood 

 Engravings. Price, 6d. ; Postage, 3d. Cheapest, Best and Most 

 Reliable Outfits in the world. 



SHE ART OF PROJECTION, AND COMPLETE MAGIQ 

 LANTERN MANUAL, by an Expert. Over 100 fine Illustrations, 

 with priceless wrinkles. How to use Oil, Limelight, Dissolving, 

 Electric, Microscopic and Polarising Lanterns, Slide Making, 

 Painting, &c. Prof. Malden says :— " Thoroughly practical 

 Work j should be studied by the experienced operator aad 

 amateur alike. Price, bound in cloth, 3s. 6d. ; Postage, sd. 

 W. C. HUGHES, Patentee and Specialist, 



Brewster House, Mortimer Road, Kingsland, London, N. 



Second-Hand Lanterns and Slides— Bargains, 



ILLUSTRATED LISTS FREE. 



SO Beautifully Coloured Blldee on loan for St- 



