lxxxii 



HARDWICKE'S SCIENCE-GOSSIP. 



MICROSCOPIC PREPARATIONS. 



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

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



The Sea^Pen, Pennatula phospliorea, showing Tentacles extended and surrounded with bundles of Spiculse, for Paraboloid. 

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

 Palate of Phaesianella Australis from DDMCQnH UTM r iPAM Section of Box brand, Puceinia buxL 

 !. Australia. Opaque. Is. 2d., post-free. A_4 FL W Ca O A Fl L A I \J k\ j Is- 2d. post-free. 



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

 (TWENTY YEARS WITH THE LATE E. WHEELER.) 



coiaX B ECTiona'S. 



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

 Geological Position, in Mahogany Cabinets. 



lOO §pe©iraseBi§, 2£fcs. 2©© Sa&eciBBjeius, 5©s. TEae Bsest valsae oftts&lmal>le» 



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



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



Fine Monocular stand by Crouch, with i-inch and \ objectives, £6 6s. Ditto by Browning, and I objective, 

 £3 10s. 3 eyepieces by Powell and Lealand, 12s. 6d. each. 2 ' 5 objective oil immersion by Powell and Lealand, ,£15. 

 i-inch by Ross, £2. J-inch Ross, best, ,£3. ij-in. Swift, 25.J. Several cheap Microtomes, Dissecting Microscopes, 

 Spot Lenses, and various other appliances for Microscopic Work. 



-J 



BEGS TO INFORM HIS NUMEROUS PATRONS THAT HE IS NOW 

 OPEN TO ENGAGEMENTS FOR 



POPULAR LECTURES 

 ON NATURAL HISTORY, 



PROFUSELY ILLUSTRATED BY PHOTOGRAPHS OF INSECTS AND 

 ORIGINAL DRAWINGS, IN THE OXY-HYDROGEN LANTERN. 



11, PAROLLES ROAD, MIRANDA ROAD, LONDON, N. 



"Something quite new." 

 EGGS OF PSOCUS 

 (an injurious insect), 

 SHOWING THE PARA- 

 SITIC FLY. hi situ. 

 2s., post-free. 



'1 



HEAD OF 

 SIX -EYED SPIDER 

 (Dysdera erythrina.) 

 Brilliant Opaque Objects, 



2s., post-free. 

 PUPA OF WOOD ANT 

 (Formica rufa). 

 For Paraboloid, 2s., post-free. 

 SYLLABUS OF 

 LECTURES, post-free. 



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



NEW AND ENLARGED EDITION OF CATALOGUE NOW READY, 



POST-FREE ON APPLICATION. 



HOW'S MICROSCOPE LAMP. HOW'S POCKET MICROSCOPE LAMP, 

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



JAMES HOW & CO., ?3, l^AlSmffWCJ-lJ©]^ STHSJEE'E', :LO:M]»®:N 



MICRO- 



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„ 



FICTION. 



SI 



Published by Chatto & Windus, with a Short Critical Notice of 

 each (40 pages, demy 8vo.), will be sent free upon application. 

 214, PICCADILLY, LONDON, W.. 



microscopic objects for modnting. 



Nine doubly stained Botanical or 18 Miscellaneous, is. id. per 

 Series, post-free. GUARANTEED QUALITY. 



All beginners should read the New Pamphlet, 



PRACTICAL HINTS ON MICROSCOPIC MOUNTING 



6d., post-free. List of Objects One Stamp. 

 R. G. MASON, 69, Clapham Park Road, London, S.W. 



REF A £ 



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 tie sent by post and receive immediate 

 attention. Estimates sent. Apparatus Fitted. 



CHAS. COLLINS, OPTICIAN, 157, GREAT PORTLAND STREET, 



(Corner of Weymouth Street.) 



LONDON, W. 



