Zo Concboloalsts. 

 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. 



7wo mimttes walk from South Kensington Station, 



W. HARRIS, 176, Bristol Street, Birming-ham, 

 HORTICULTURAL BUILDER, CABINET MAKER, &c. 



Contractor for Fittings and Joinery Work to The University of Birmingham, 

 and the Queen's Faculty of Medicine. 



Estimates given for every description of Woodwork, Cabinet Making, 



House Carpentry, &c. Repairs promptly attended to. 



Living Specimens for the Microscope. 



Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actinosphaerium, 

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

 Specimens of Pond Life Price l/-per Tube, Post P'ree. Helix pomatia, Astacus, 

 Amphioxus, Rana, Anodon, etc., for Dissection purposes. 



THOMAS BOLTON, 25, BALSALL HEATH ROAD, Birmingham. 



JAMES SWIFT & SON, 



MANUFACTURING OPTICIANS, 



Seven Gold Medals awarded for Optical ExcelUnce. 



Student's Microscope fitted with % in. and \ in. 

 Objectives, sliding course adjustment, micrometer 

 screw fine adjustment for slow focussing, eye-piece 

 and iris diaphragm, in Cabinet - £5 5 



Double nose-piece and extra eye-piece 10 



Fig. 2. Student's Stand, as per illustration 

 with f in. and \ in. Objectives, eye-piece and iris 

 diaphragm, in Cabinet - - - £1 15 



Double nose-piece and extra eye-piece 15 



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

 and fine adjustments, extra large stage covered with vulcanite, fin. ^in. and^'^in. 

 Objectives, Abbe condenser N.A. \2 fitted with iris diaphram and special 

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



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



UNIVERSITY OPTICAL WORKS, 



81, TOTTENHAM COURT RD., 



LONDON, W. 



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