X 



HARDW/CRE'S SCIENCE-GOSSIP. 



MICROSCOPIC PREPARATIONS. 



FIRST -CLASS SPECIMENS, New and Rare Objects in every Department of Microscopy. 

 LORD S. Gr. OSBORNE'S DIATOMESCOPE, Post-free, 12s. 



The Phantom Shrimp, Caprella linearis, for Polariseope or Paraboloid. Is. 6d., post free. See " Science Gossip," Deo. 1890. Page 280' 

 Shell of Avicula from South f O M C C? Tl TLJ IMTAM Hydroid Zoophyte, showing Tentacles 

 Australia Is. 2d., post-free. £4 K N 2> I 1*1 I N 1 O N , StoP™&OT» 

 12, VOELEY ROAD, UPPER HOLLOWAY, LONDON, N. 

 (TWENTY YEARS WITH THE LATE E. WHEELER.) 



Comprising FOSSILS, MINERALS, and ROCKS, labelled with Name, Locality, and 

 Geological Position, in Mahogany Cabinets. 



lOO Specimens, 2£s. 200 Specimens, 50s. The best value obtainable. 



Micro- Sections of Rocks in great variety. Cabinets, Glass-Topped Boxes, and other Geological requisites. 



THOMAS D. RUSSELL, 78, NEWGATE STREET, E.C. 



SECOND-HAND MICROSCOPES AND OBJECTIVES. 



Binocular " Popular " Microscope by R. and J. Beck, with and i-inch Object Glasses, Stand Condenser, and 

 double Nose-piece, in Mahogany Case ; cost ,£15 ; price ,£8 ior. Crouch's " Student's " Binocular Microscope with 

 best jth Objective and a i-in. ditto by Ross, in Mahogany Case; price £9. A bargain. Ross' Five Guinea 

 Dissecting Microscope with 3 Lenses, price £3 3s. Beck's small Dissecting Microscope, as per Catalogue 32A., 

 price £2.. 



SANDS, HUNTER & Co., 20, CRANBOURN ST., LONDON, W.C. 



THE LIFE- HISTORY 

 OF THE 



FRED. ENOCK, F.E.S., 



NEW PREPARATION. 



BEGS TO INFORM HIS NUMEROUS PATRONS THAT HE IS NOW 

 HESSIAN FLY. OPEN TO ENGAGEMENTS FOR 



POPULAR LECTURES 



Section through Compound 



A most interesting and 1 V Viz 1 ?. 1 * A V ^ ,' I ^ -l""^-. . , EyeS ° f Dr0ne FIy 



instructive Lecture on this QN NATURAL HloTORY (Erastalis Tenax.) 



P est - PROFUSELY ILLUSTRATED BY PHOTOGRAPHS OF INSECTS AND Showing Facets Rods &C. 



With between 60 and 70 ORIGINAL DRAWING, IN THE OX Y- HYDROGEN LANTERN. Is 7d ' tf ' 



11, PAROLLES ROAD, MIRANDA ROAD, LONDON, N. " " P ° s " ree ' 



Original Illustrations. 



HOW & CO.'S LANTERN SLIDES FOR LECTURES, &c. 



^EOLOCICAI SERIES. 



NEW AND ENLARGED EDITION OF CATALOGUE NOW READY, 



POST-FREE ON APPLICATION. 



HOW'S MICROSCOPE LAMP. HOW'S POCKET MICROSCOPE LAMP. MICRO- 

 PETROLOGY, TYPICAL ROCK SECTIONS, Is. 6d. each. 



JAMES MOW & CO., «$, rARRI]S«1103f STREET, 



LECTURES ON PHY SICAL GEOGRAPHY, GEOLOGY, BOTA NY, AND ZOOLOGY, 



The Editor of SCIENCE-GOSSIP has Six Nights still open next Session to be engaged for 

 EXTEMPORANEOUS LECTURES (well Illustrated with Diagrams) to 



Natural History, Literary, and Scientific Societies, &c. 



For Terms, &c., apply to Editor of Science- Gossip, care of Messrs. Chatto & Windus, 214, Piccadilly, London, W. 



REPAIR DEPARTMENT. 



SPECTACLES can be: gen t tiy post and receive immediate attention. MICROSCOPES, TELESCOPES, OPERA and FIELD 

 GLASSES, ANEROID and other BAROMETERS. Scientific Instruments of every description put in WORKING order or 

 MADE AS NEW, Estimates sent. Apparatus Fitted. 



CHARLES COLLINS, OPTICIAN, 157, GREAT PORTLAND STREET, LONDON, W. 



(Corner of Weymouth Street.) 



MICROSCOPY.— MICRO-NATURAL HISTORY (ZOOLOGICAL AND 

 BOTANICAL) AND THE ALLIED SCIENCES. 



Just Published, and will be sent Post Free for Two Stamps, W. P.Collins's New Catalogue of Books (mostly Second/iajtt^ 

 Scientific Libraries Purchased and Books taken in Exchange. 



W. P. COLLINS, Science Bookseller, 157, Great Portland Street, London, W. 



