1 



HARDWICKE'S SCIENCE-GOSSIP. 



MICROSCOPIC PREPARATIONS. 



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

 LORD S. G. OSBORNE'S DIATOMESCOFE, Post-free, 12s. 



The Sea-Pen, Pennatula ph.osph.orea, showing 1 Tentacles extended and surrounded with bundles of Spiculae, for Paraboloid. 

 Is. 6d., post free. See "Science Gossip," June. Page 139. 



sm^^^^L ERNEST HINTON, 



12, VOELEY ROAD, UPPER HOLLO WAY, 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, J83>s. SO© Specimens, 50s. The 1>est value obtainable. 



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



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



SECOND-HAND MICROSCOPES AND OBJECTIVES. 



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

 double Nose-piece, in Mahogany Case ; cost^i5 ; price £8 ioj. Crouch's " Student's " Binocular Microscope with 

 best ^th Objective and a i -in. ditto by Ross, in Mahogany Case; price £g. 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.O. 



SYLLABUS of LECTURES FRED. ENOOK, F. E.S., " Something quite new." 



BEGS TO INFORM HIS NUMEROUS PATRONS THAT HE IS NOW VTCS. C\V Pcnr-TTC 



ON ECONOMIC OPEN TO ENGAGEMENTS FOR itrLrb 01 Fi3 ° CUb 



ENTOMOLOGY, FOR POPULAR LECTURES 



: season 1891-1895. ON NATURAL HISTORY, 



PROFUSELY ILLUSTRATED BY PHOTOGRAPHS OF INSECTS AND SiliS UL.Y. In situ, 



■^-r^.^r ™ T ORIGINAL DRAWINGS, IN THE OXY-HYDROGEN LANTERN. 



ready in june. ^ PARQLLES ROAD, MIRANDA ROAD, LONDON, N, 



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



GEOLOGICAL KKlMIiW. 



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. 

 J11E§ HOW & CO., til, rABRMGDOI §TKEET, LOliOOV. 



(an. injurious insect), 

 SHOWING THE PARA- 



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. 



MICROSCOPES, TELESCOPES, OPERA and FIELD GLASSES, ANEROID and other BAROMETERS. Scientific Instruments 

 of every description put in WORKING order or MADE AS NEW, SPECTACLES can oe sent t>y post and receive immediate^ 

 ' attention. Estimates sent. Apparatus Fitted. 



CHAS. 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 Nau Catalogue of Books {mostly Secondhand). 

 Scientific Libraries Purchased and Books taken in Exchange. 



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



