tlo Concbologists. 



H. B. PRESTON, F.Z.S., 



Begs to inform Collectors and others that he will be pleased to 

 forward on application price list of any GENERA included in his 



LARGE AND VARIED STOCK OF SHELLS. 



SELECTIONS SENT ON APPROVAL. MUSEUMS SUPPLIED. 



Address-H. B. PRESTON, F.Z.S., 

 3, Sydney Terrace, Fulham Road, London, S.W. 



Two ininuks walk from South Kensington Station. 



JAPANESE SHELLS. 



Faultless siierimeiis of the beautiful and interesting shells of Japan and the 

 Loo Choo Islands, both land and marine, are offered at low prices, sent by mail. 

 The land shells include some of the finest Helices of the genera Eulota, Ganc- 

 sella, etc. The Clausilias, unlike those of Eiu'ope, are the largest of any region. 

 Also many fine operculates and Marine Shells. 



Y. HIRASE, Kyoto, Japan. 



SHELLS-LAND, FRESHWATER, & MARINE. 



LARGE AND RICH COLLECTIONS FROM ALL PARTS OF THE 



^YORLD ALWAYS ON HAND. 



Catalogue No. V, Free on application. 



H. FRUHSTORFER, THURM STRASSE 37, RERLIN, N.W. 



JAMES SWIFT & SON, 



MANUFACTURING OPTICIANS. 



Seven Gold Medals aivardedfor Oj)tical Excellence. 



Students Microsco])e fitted with f in. and J in. 

 OVtjectives, sliding course adjustment, micrometer 

 screw fine adjustment for slow Ibcussing, eyepiece 

 and iris diaphragm, in Cabinet . £5 5 0. 



Double nosepiece and extra eyepiece 10 0. 



Fig. 2. Students Stand, as per illustration 

 with g in. and ^ in. Objectives, eyepiece and iris 

 diaphragm, in Cabinet . . . £7 15 0. 



Double nosepiece and extra eyepiece 15 0. 



Prof. Delepine's microscope, as used in the Birmingham University, with course 

 and fine adjustments, extra large stage covered with vulcanite, g in. ^ in. and xV in. 

 Objectives, Abbe condenser N.A. 1'2, fitted with iris diaphragm and special 

 focussing adjustment, triple nosepiece and eyepiece, in Cabinet . £15 0. 



This stand is used in all the principal laboratories throughout tlie Kingdom. 



UNIVERSITY OPTICAL WORKS, 



81, TOTTENHAM COURT ROAD, 



LONDON, W. 



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