36-PAGE CATALOGUE MAILEB FREE ON APPLiCATlON. 



With 1-inch and j-inch Objectives of splendid definition, complete, in 



Mahogany Case, £5 lOs. 



This Microscope is described and illustrated in Dr. Carpenter's last Edition of " The 

 Microscope and its Revelations," and the author states in the preface that '' His principle 

 has been to make mention only of such makers as have distinguished themselves by the in- 

 troduction of any new pattern vk-hich he regards as deserving of special recommendation." 



From C. P. Hobkirk, Esq., F.L.S., Dewsbury, author of Synopsis of British Mosses : 

 — " I have known this instrument since its first introduction, and have frequently used 

 dififerent examples of it, and all with equal pleasure. It is easy of manipulation, and the 

 fine adjustment is one of the best I have ever used. To anyone who desires to have a 

 really good useful instrument at a moderate price I always recommend your Histological 

 Microscope." 



Harley Binocular Microscopes, Dissecting Microscopes, Cabinets, Objects, Lamps, 

 Object Glasses, Thin Glass, Ground Slips, Pocket Magnifiers, Mounting Media, &c. 



CHAS. COLLINS, MICROSCOPE MAKER, 



157, GREAT PORTLAND STREET, LONDON, W . 



W. p. COLLINS, 



Microscopical and Natural Science Bookseller. 



New and Second-hand Works on Algae, Biology, Botany, Chemistry, Corals, 

 Conchology, Desmids, Diatoms, Entomology, Fossils, Geology, Histology, 

 Infusoria, Microscopy, Mineralogy, Natural History, &c. 



New Catalogue, just ready, will be sent on application. 



Back Parts of the various Microscopical Journals always in sioch. 



Microscopical Books Bought or Exchanged. 



157, GREAT POETLAnFsTREET, Oxford Street, 



LONDON (corner of Weymouth Street). 



CHAS. COLLINS, Junr., 



MICRO-NATURALIST, 



25, ST, MARY'S ROAD, HAELESDEN, LONDON, N.W. 



{All Slides mounted by C. COLLINS, Junr., are kept in Stock, and 

 can be seen at 157, Great Portland Street, W.J 



Now ready the following, forming the First Three Series of Collins' " Special " Micro 

 Slides, issued at 10/6 per Set, each set being carefully selected, and enclosed in 



a neat Cloth Racked Box : — 



Series No. 1.— 12 Fish Scales (Opaque) for Monocular or Binocular. 



,, la.— 9 ,, (Polariscope) ; 3 Fish Skins (Opaque). 



„ 2.— 12 Slides of Heads of Insects, Moimted withoid Pressure, and specially 

 showing the structure of the Mouth in the Biting and Sucking Orders. 



Full detailed Prospectus, and opinions of the Scientific Press, post free on application. 



From Chas. Collins's intimate acquaintance with all branches of the Microscopical 

 Trade, he respectfully solicits Microscopists to furnish him with particulars of their re- 

 quirements in Microscopical Apparatus (New or Second Hand), Mounting Materials, 

 and all other accessories, having facilities for procuring and supjjlyiug them on most 

 advantageous terms. 



CHAS. COLLINS, Junr., 



85, SI. MABY'S BOAS, HABLESSEK, I0I7D0N, If.W. 



