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HENRY CROUCH'S MICROSCOPES. 



INTENDING PURCHASERS of MICROSCOPES are 

 invited to apply for a CATALOGUE, fully Illustrated, 

 and giving full particulars of INSTRUMENTS of the 

 LATEST CONSTRUCTION, devised for every class of 

 investigation. 



BARBICAN OPTICAL WORKS, 66, BARBICAN, E.C. 



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

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



Rare Diatomacese. Test and Binocular Objects. Holler's Typen Plattes. 



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



EDMUND WHEELER, 48 B, ToUington Road, HoUoway, London, N. 



NATURAL HISTORY 



and GENERAL SCIENCE. 



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



Catalogues to be had at 



JOHN WHEIDON'S, 58, GREAT ftTJEEN STREET, LONDON, W.C. 



A Pamphlet just published by James Swift, entitled 



THE MICROSCOPE AND ACCESSORY APPARATUS; 



NOTES ON THE CONSTEITCTION, SELECTION, AND USE. 

 By post, 24 Stamps. Also, 



Of New Microscopes, Appabatus, and Objectives, for 6 Stamps. 



NEW OIL-IMMERSION 1-12 INCH OBJECTIVE, PRICE £12. 



SWIFT A]Vr> SOIV, tlniT-ersity Optical Works, 



81, TOTTENHAM COURT ROAD, LONDON, W. 



STUDIES IN MICROSCOPICAL SCIENCE. 



Edited by ARTHUR 0. COLE, F.R.M.S. 



Section I. — ANIMAL HISTOLOGY. — This portion of the Work will be issued in Monthly Numbers, 

 commencing vnth No. 1, on the 1th July, 1883, at an Annual Subscription of£,\ is., payable in advance. 



It will consist of a systematic treatise on comparative histology ; illustrative types will be chosen ancj 

 described fully, and will be accompanied by microscopical preparations and lithographed plates. 



Section II.— BOTANICAL ^ISTGLOGc'Y .—This portion of the WorTcwill be issued in Monthly Numbers, 

 commencing with No. 2, on the 21st July, 18S3, at an Annual Subscription of £,1 Is., payable in advance. 

 The wbrlj will be conducted on the lines indicated for Section I. 

 Each Section will be paged separately, so as to give Subscribers the option of purchasing either. 



Section III.— POPULAR MICROSCOPY.— Publication to commence on the 14th July, 1883, and to 

 continue monthly thereafter. A series of Popular Objects will be Issued. Each number wiU contain a 

 preparation, a lithograph, and descriptive letterpress, with methods of preparation, &c., of the object issued. 

 Sdbsckiption, £1 is., payable in advance. 



A Detailed Prospectus, with List of Preparations, &c., may be obtained on application to the Editor- 

 Si. Domingo HonsE, Oxfokd G-akdeNs, Noxting Hill, London, W, 



