Zo Coiicbologists. 



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, d.W. 



7'n-o minutes ^ruJkfrom Suiifh Kcasington Station. 



JAPANESE SHELLS. 



Faultless specimens of the beautiful ami interesting shells of Japan and tlie 

 Loo Choo Islands, both laud 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 Eurojjc, are the largest of any region. 

 Also many fine operculates and Marine Shells. 



Y. HIRASE, Kyoto, Japan. 



Xivino Specimens for the flDicroscope. 



Volvox, Spirogyra, Desmids, Diatoms, Amceba, Arcella, Actinosphoerium 

 Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many other 

 Specimens of Pond Life. Price 1/- per Tube, Post Free. Helix pomatia, Astacus 

 Amphioxus, Rana, Anodon, «S:c., for Dissection purposes. 



THOMAS BOLTON, 25, BALSALL HEATH ROAD, Birmingham. 



JAMES SWIFT & SON, 



MANUFACTURING OPTICIANS. 



Seven Gold Medals awarded/or Optical Excellence. 



Students Microscojie fitted with f in- and ^ in. 

 Objectives, sliding course adjustment, micrometer 

 screw fine adjustment for slow focussing, eyepiece 

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



Double nosepiece and extra eyepiece 10 0. 



Fig. 2. Students Stand, as per illustration 

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

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



Double nosepiece and extra eyepiece 15 0. 



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

 and fine adjustments, extra large stage covered with vulcanite, § in. jt in. and yV in. 

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

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



Tliis stand is used in all the principal laboratories throughout the Kingdom. 



UNIVERSITY OPTICAL WORKS, 



81, TOTTENHAM COURT ROAD, 



LONDON, W. 



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