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MICROSCOPICAL REAGENTS 



Specially Pure for Bacteriological Work. 



Dry Stains ; Staining Solutions ; Hardening, Fixing and Clearing R<agents ; 

 Mounting Media ; and Cedar Wood Oil for Oil Immersion Lenses :: 



ANALYTICAL REAGENTS 



Volumetric Solutions, Test Solutions, Test Papers. 



INDICATORS FOR BIOCHEMICAL RESEARCH 



Sbrensen Solutions. Buffer Solutions. 



THE BRITISH DRUG HOUSES Ltd. 



Makers of Fine Chemicals, 



Graham St., City Rd., London, N.l, 



Chemical Works : Wharf Road, London, N.l. 



H. K. LEWIS & CO. LTD. 



Medical and Scientific Booksellers. 



Complete Stock of Text Books and Recent Literature 



in all Branches of Medical and Veterinary Science. 



LARGE STOCK OF SECOND ■ HAND BOOKS ALWAYS AVAILABLE 



at 140, GOWER STREET. Telephone: Museum 4031. 



Orders by post or telephone promptly attended to. Catalogue on application 



MEDICAL AND SCIENTIFIC 



CIRCULATING LIBRARY. 



Warren Strrct Station (Five minutes) I Close to Euston bquare Station 



All Tube Railways, I (Metropolitan Railway). 



Annual Subscription, Town or Country, from One Guinea 

 The Library Reading and Writing Room (1st floor) is open daily. 



Catalogue of Library, with Supplement (1918-20), with Authors and 

 Subjects Index, 558 pp., demy 8vo, 12 6 net (to Subscribers, 6/- net). 

 Supplement, 64 pp. (Separately), I/- net. Postage 2d. 

 QUARTERLY LIST OF ADDITIONS POST FREE ON APPLICATION. 



Telegrams: " Publicavit, Eusroad, London." Telephone: Museum 1072, 



136, GOWER ST. & 24, GOWER PLACE, LONDON, W.Cl. 



(4SS6— b) 



