Manufacturers of Optical and Scientific Instruments, 



Contractors to all Scientific Departments of H.M. Home 

 ana Colonial and many Foreign Governments. 



Crands Prix, Diplomas of Honour, and Cold 

 Medals At London, Paris, Brussels, etc. 



WIFT & SON 



MICROSCOPES 



AND OTHER 



INSTRUMENTS FOR 



ALL BRANCHES OF 



GEOLOGY, 

 MINERALOGY, 

 PETROLOGY, 



Sole Makers of the 



"DICK" MINERALOCICAL 



MICROSCOPES. 



Dr. A. HUTCHINSON'S 



UNIVERSAL GONIOMETER. 



University Optical Works, 



81 TOTTENHAM COURT ROAD, 



LONDON, W. 1. 



WANTED and FOR SALE 



PETROLOGIGAL and other MICROSCOPES, 



Microtomes, Spectroscopes, etc. 



BEST PRICES GIVEN. SEND FOR CATALOGUE. 



JOHN BROWNING (Estab. 1765), 146 Strand, London, W.C. 2. 



JUST ISSUED. 



CATALOOUE OF BOTANICAL BOOKS 



recently piu-chased, including a fine set of T]ie Botanical Magazine. 

 OFFERED FOR SALE BY 



DULAU 8c CO., LTD. 



{Established 1792), 

 34-36 Margaret Street, Cavendish Square, London, W.l. 



LIBRARIES PURCHASED IN TOWN OR COUNTRY. 



