( 15 ) 



WITH EXTINGUISHER. 



EQUAL TO 45 CANDLES. 

 Prize Medals— PAKIS, THEEE MEDALS, 1878. 



MANUFACTURED BY 



JOIVES &> TTILLIS^, Patentees, 



43, Great Kussell Street, and 260, Euston Road, London, and 

 Temple Eow, Birmingham. 

 The most brilliant and economical mode of illumination adapted to public and 

 domestic use. There is no lamp comparable to it for brilliantly giving three beautiful 

 and vigorous flames of light. The wicks being in a triangular form, each wick is 

 supplied with a separate thumb-screw,by which it can be either elevated or depressed. 

 The illuminating power is 45 Candles, and the consumption of oil less in pro- 

 portion than the Duplex, or any other Paraffine Lamp. 



THIS LAMP, SUITABLE FOR MICROSCOPISTS, CAN BE SUPPLIED ON A LOWER STAND. 



Show-Rooms: 43, GREAT ETJSSELL STREET, W.C. 



Works : 260, EUSTON ROAD, N.W. 



W. EMIL BOECKER, 



M:ANXj:PACTTJiii]sra optician, 



WETZLAR, GERMANY, 



SE]Vr>S OlftA-TIS HIS OA.TALOGHJE 



OF MICROSCOPES, OBJECTIVES, MICROTOMES, AND APPARATUS 

 FOR SCIENTIFIC RESEARCH, 



Heinr. Boecker's Microscopical Institute, at Wetzlar, Germany, 



SUPPLIES 



MIOROSCOPICAL PREPARATIONS 



In all branches of Natural History.. A Large Selection of Injections, Stained Preparations, Insects, Crustacea, 

 Entozoa, and Lower Animals ; Vegetable Anatomy, Woods, Articles of Food, Algas, Mosses, Fungi, Diatoms, 

 and Sections of Rocks and Fossils. Instruments and Appliances for Mounting, &c. Sciopticon, with addi- 

 tion for using microscopic objectives. (Jlass Photograms. 



Catalogue No. IX., Gratis and Post-free. 



THE BRITISH MOSS FLORA. 



By E. BKAITHWAITE, M.D. 



Part VI. is now ready, price 4s. Subscriptions (10s. 6c?.) may be sent to the 

 Author. 



The previous Parts, with three Plates, may be had from the Author, at 303, Clapham Road, London. 



d 



