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



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

 Rare Diatomacese. Test 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. 



SOWEEBY'S USEFUL PLANTS OF GEEAT BRITAIN; 



A Treatise upon the Principal Native Vegetables capable of Application as Food, Medi- 

 cine, or in the Arts and Manufactures. By B. C. Pieepoint Johnson, llliisfrated by 

 300 Coloured Figures of the Plants by John E. Sowebby. Ruyal 8vo, cloth extra, 

 10s. 6d. (pub. £1 OS.). 



Also a large Collection of Works, Old and New, on lilicroscopical Subjects, to be had of 

 JOHN WHELDON, F.B.U.S., Natural History Bookseller, 58, Ot Queen St, London, W.C. 



SWIFT &: SO]V 



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



A NEW THIN MECHANICAL STAGE AND PATENT COARSE AND 

 FINE ADJUSTMENTS, 



Also SWINGING STTBSTAGE 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 AETHUE C. COLE, F.R.M.S., &e., assisted by several Eminent Specialists. 



A Wf.eklt Periodical for the use of Students, Teachers, Professors, and the Medical Profession, and others 

 interested in the progress of ihe Natural Sciences. Each Number is iUustrated 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 arc specially observed. 



The terms of subscription, payable stietly in advance, Including Postage, are — In Great Britain, Quarterly, 

 11. 4s. ; Half-yearly, 2l. is. ; Yearly, 41. i$. Abroad, to Countries within Postal Union, Quarterly, U. 6s. 6d ; 

 Half-yearly, 21. 8s.; Yearly, 4/. 12s. 6d. Those desirous of receiving a smaller number of Specimens, and 

 fortnightly, may, for H. 2s. a year, receive either the seiies of 26 Histological Preparations or the 26 

 "Botakical and Petrolooical Sections, together with their acconipanjing essays and illustrations. (Abroad 

 this Subscriptions will be 21. 6s. M.) 



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



SUCCESSORS TO GEO. KNIGHT & SONS, 



73, FARRINGDON ST. (late of 2, Foster 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 12«. 



Rock Sectioxs and other Microscopic Objects. 



NOTICE OF REMOVAL. 



PEEPAEEE OP MIOEOSOOPIO OBJECTS, 



Begs to infornn his numerous friends that he is leaving London, and that after June 5tJi 

 his address will be Febndale, Bath Road, Woking Station, Surbey, where he will 

 have greater facilities for supplying Lis Entomological Preparations. 



