XTo Concbologists. 

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



Begs to inform Collectors and otliers that he will be pleased to forward on 

 apphcation price list of any GENERA included in his 



LARGE AND VARIED STOCK OF SHELLS. 



SELECTIONS SEi^T ON APPROVAL. MUSEUMS SUPPLIED. 



A very fine series of the rarer British ]Marine Shells now on hand. 



Address— H. B. PRESTON, F.Z.S., 

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



Two minutes walk from South Kensington Station. 



W. HARRIS, 176, Bristol Street, Birmingham, 



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. llcpairs -promptly attended to. 



Living Specimens for the Microscope. 



Volvox, Spirogvra, Desmids, Diatoms, Amoeba, Arcella, Actinosphserium, 

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

 Specimens of Pond Life. Pi-ice 1/- per Tube, Post Free. Helix pomatia, 

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



THOMAS BOLTOX, 25, BALSALL HEATH ROAD, Birmingham. 



JAMES SWIFT & SON, 



Mar]ufacturing Opticiaris, 



Seven Gold Medals awarded for Opt/ciil Excellence, 



Student's IMicroscope fitted with sin. and iin. 

 Objectives, sliding course adjustment, micrometer 

 sci'ew fine adjustment for slow focussing, eye-piece 

 and iris diaphragm, in Cabinet £5 5 



Dovible nose-piece and extra eye. piece 10 



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

 jin. and ^in. Objectives, eye-piece and iris dia- 

 phragm, in Cabinet - - £7 15 



Double nose-piece and extra eye- piece 15 



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



cour.se and fine adjustments, extra large stage covered with vulcanite, jin. -Jm. 



and jVin. Objectives, Abbe condenser N.A. 1'2 fitted with iris diaphram and 



special focussing adjustment, triple nosepiece and eyepiece, in Cabinet £15 O 



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



UNIVERSITY OPTICAL WORKS, 



81, TOTTENHAM COURT ROAD, 

 LONDON, W. 



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