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Is^IOI^OSOOI^IO OBTEOTS. 



Classified Catalogue. NEW EDITION FOR 1880, Post Free and Gratis. 



Specimens of the highest attainable perfection in every branch of Microscopy. New and 

 Eare Diatomaeeae. TQst and Binocular Objects. Moller's Typen Plattes. 



Microscopes, Achromatic Objectives, and all Materials and Instruments for Mounting. 



EDMUND WHEELER, 48 B, Tollington Road, Holloway, London, N. 



MTUEAL HISTORY AM) GENERAL SCIENCE. 



THE LARGEST COLLECTION OF SECOND-HAND WORKS RELATING TO THE ABOVE. 

 C-a.tj^log-xjes to be h^d of 



JOHN WHELDON, 58, Great Queen Street, London, W.C. 



A neio Zoological List xoill he puNished shortly, post-free Three Stamps. 



Are now adapting to their '* Challenge " and other Microscopes, 



A NEW THIN MECHANICAL STAGE AND PATENT COARSE AND 

 FINE ADJUSTMENTS, 



Also SWINGING SUBSTAGE RADIAL ILLUMINATOR, as well as 

 all the latest Improvements and Additions to the Microscope. 



Catalogue fully Illustrated, and Circular, containing particulars of the above, by post 

 for six stamps, or mailed abroad free. 



UNIVERSITY OPTICAL WORKS, 81, TOTTENHAM COURT ROAD, 



LONDON, "W.C. (formerly of 43, University Street). 

 NOW PUBLISHING. 



STUDIES IN MICROSCOPICAL SCIENCE. 



Edited by AKTHUE C. COLE, F.E.M.S., &c., assisted by several Eminent Specialists. 



A Weekly Periodical for the use of Students, Teachers, ProfeBsors, and the Medical Profession, and others 

 interested in the progress of the Natural Sciences. Each Number is illustrated and accompanied by-^ 

 (1) A Microscopical preparation of the highest class and most perfect finish ; (2) A description of the Speci- 

 men, the methods of its preparation as a means of Study, the literature concerning it, &c. ; (3) A Chromo- 

 lithographed. Photographed, or Engraved drawing or diagram of the Object, in the execution of which 

 Scientific accuracy and artistic detail are specially observed. 



The terms of subscription, payable strictly in advance, including Postage, are — In Great Britain, Quarterly, 

 \l. is. ; Half-yearly, 21. is. ; Yearly, il. is. Abroad, to Countries within Postal Union, Quarterly, 11. 6s. 6d ; 

 Half-yearly, 21. 8s.; Yearly, il. 12s. 6d. Those desirous of receiving a smaller number of Specimens, and 

 f(/rtnightly, may, for 21. 2s. a year, receive either the series of 26 Histological Pkepaeatioks or the 26 

 Botanical and Petbological Sections, together with their accompanying essays and illustrations. (Abroad 

 this Snbtcrlption will be 21. 6s. 6d.) 

 1 5 Subscriptions to the Editor, Mr. A. C. Cole, St. Domingo House, Oxford Gardens, London, W. 



J-.A:3S^ES lEiO'V^ cte OO-:, 



SUCCESSORS TO GEO. KNIGHT & SONS, 



73, FARRINGDON ST. (late of 2, Poster Lane, and 5, St. Bride St.). 



HOW'S MICROSCOPE LAMP. THE MINIATURE MICROSCOPE LAMP. 



HOW'S STUDENTS' MICROSCOPE, £5 5<. THE POPULAR BINOCULAR MICROSCOPE, £12 124. 



Rock Sections and other Microscopic Objects. 



PEEPAEER OF MIOEOSOOPIO OBJECTS, 

 Late of 30. Russell Road, Seven Sisters' Road, London, N., 



HAS REMOVED TO 



FERNDALE, BATH ROAD, WOKING STATION, SURREY. 



