( 15 ) 



WITH EXTINGUISHER. 



EQUAL TO 45 CANDLES. 

 Prize Medals— PAKIS, THREE MEDALS, 1878. 



MANXTFACTUIIED BY 



JO]VES & W^ ILL IS, Patentees, 



43, Qreat Eussell Street, aad 260, Euston Koad, London, and 

 Temple Eow, Birmingham. 

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

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

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

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

 The lUmnmating power is 45 Candles, and the consumption of oil less in nro- 

 portioa than the Duplex, or any other Paraffine Lamp. 



THISILAMP, SUITABLE FOR MIGR08G0PI8T8, CAN BE SUPPLIED ON A LOWER STAND. 

 Show-Eooms: 43, GREAT RTTSSBLL STREET, W.C. 

 "Works ; 260, EUSTOKT ROAD, N.W. 



W. EMIL BOECKER, 

 M:AisruFACTXJiiiisra optician, 



"WETZLAR, GEHMANY, 

 sE]vr>s GRATIS HIS oai:ax.ooxje 



OP MICROSCOPES, OBJECTIVES, MICROTOMES, AND APPARATUS 

 FOR SCIENTIFIC RESEARCH. 



Heinr. Boecker's Microscopical Institute, at Wetzlar, G-ermany, 



SUPPLIES 



MICROSCOPICAL 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, Algaj, Mosses, Fungi, Diatoms' 

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

 tion for nsing microscopic objectives. Glass Photograms. 



Catalogue No. IX., G-ratis and Post-free. 



l!wd^ - OP JR E ID . EINT O OKI, 



PEEPAEEE OP MIOEOSOOPIO OBJIiOTS, 

 Late of 30, Russell Road, Seven Sisters' Road. London, N., 



HAS REMOVED TO 



FERNDALE, BATH ROAD, WOKING STATION, SURREY. 



JUST PUBLISHED. ~~~~ 



MIKROSKOPISCHER UNTERSUCHUNGEN 



IM BOTANISCHEN LABOEATORIUM. 

 Von WILHELM BEHRENS. 



2 Plates and 132 Wood, Engravings, 8uo, 12s.,' Cloth, 13?. 6'?. 

 This book has been written with a view to its use by the Botanical Mirroscopist on his working table. It 

 contains the principal methods of preparing and conserving Botanical objects. Is also treats in e.\tenso (he 

 so-called "Botanical Micro-Chemistry." 



Brunswick ; SCHWETSCHKE & SON. London and Edinburgh : WILUAKS & NORGATE. 



SUCCESSORS TO GEO. KNIGHT & SONS, 



73, FARRINGDON ST. (late of 2, Foster Lane, and 5, St. Bride St.). 



HOW'S MICROSCOPE LAMP. THE MINIATURE MICROSCOPE LAMP. 



HOW'S STUDENTS' MICROSCOPE, £5 5s. THE POPULAR BINOCULAR MICKOSCOPK, £12 12s. 



Rogic Srctioxs and othkr MrcRo,«c<ipro Objects. 



d 



Cto OO-:, 



