JAMES SWIFT & SON, 



Manufacturing Opticians. 

 7 Gold Medals awarded for optical excellence. 



IMPROVED UNIVERSITY 

 MICROSCOPE. 



An Ideal Instrument for Amateur or 

 Professional for General Microscope Re- 

 search. Fitted with Coarse Adjustment by 

 Diagonal Rack and Pinion, Patented Long 

 Lever Fine Adjustment (Climax form), 

 1 in. and | in. or J- in. Objectives, of highest 

 Optical excellence. 



One Ocular and Iris Diaphragm in Case 



Binocular Arrangement, extra 



Patented Mechanical Stage 



Catalogue Free on Application. 



University Optical Works, 81, Tottenham Court Road, W. 



LIVING SPECIMENS 



FOR 

 THE 



MICROSCOPE : 



Volvox globator, Desrnids, Diatoms, Spirogyra, Amoeba, Actinophrys, Spongilla, 



Vorticella, Stentor, Hydra, Cordylophora, Stephanoceros, Melicerta, Polyzoa, and 



other forms of Pond Life. 1s. per tube, with printed drawing, post free. 



THOMAS BOLTON, Naturalist, 

 25, Balsall Heath Road, BIRMINGHAM. 



OUT OF PRINT BOOKS supplied. 



Books on Botany, Zoology, Biology, Microscope, Microscopy, Histology, 

 Taxidermy, Diatoms, Algae, Hepaticae, Geology, Chemistry, Physics. No 

 matter what the subject, published here or abroad. Most expert book-finders 

 in England. Correspondents all over the world. Send list of wants to 



BAKER'S GREAT BOOKSHOP, 14-16, John Bright Street, BIRMINGHAM. 



SCIENTIFIC & EDUCATIONAL BOOKS, 



NEW AND 

 SECOND-HAND 



SECOND-HAND 





"i 



LARGEST STOCK IN LONDON of 



SCHOOL, MATHEMATICAL, 

 MECHANICAL, BOTANICAL, 

 ELEMENTARY and ADVANCED 



NATURAL HISTORY & SCIENTIFIC BOOKS 



Of ALL KINDS at about HALF PUBLISHED PRICE. 



Classical, Theological, & Foreign BooKs. Keys & Translations. BOOKS FOR /\LL EX^MS. 



J. POOLE & CO. (Ill;;), 104, Charing Cross Road, London, W.C. 



Enquiries by Post receive immediate attention. 



