I/ 



SCIENCE-GOSSlP. 



STEVE NS' AUCTION ROOMS. 



SALE ANNOUNCEMENTS. 



Tuesday, Oct. 24.— A Collection of Natural History Specimens. 



' SCIENTIFIC INSTRUMENTS 



TNCi.lDTNt: ALL KINHS OF 



Photographic and Optical Apparatus, Electricals, 



Mathematical, Surgical, and Musical Instruments, 



and Miscellaneous Property of every description. 



EVERY F RIOAY . 



NATURAL HISTORY SPECIMENS 



OKCE AND TWICE A M ONTH. 



Mn J. C. STEVENS 



Begs to call attention to the abo\-e Sales at his Great Rooms. 



38, King Street, Covent Garden. 

 Goods Received at any Time, and Included in these Sales, 



TANGENT GALVANOMETER, £1 10s. 



T. TAMBLYN-WATTS, 



Scientilic Apparatus IVlaker, 



Goldielands, 



Settle, Yorks. 



Catalogue of Electrical Apparatus and Materials, 

 6d. post free. 



Catalogue of Balances and Weights, Apparatus for 

 the study of Mechanics, etc., 6d. post free. 



IVII! 



IVI. 



Warwk K Loik;k, Upper Kxowi.e, Bristol. 

 Invites ofters for her valuable collection of 



MINERAtS, FOSSItS, SHEttS. 



As under, which she is prepared to dispose of to col- 

 lectors or Public jMuseiinis, divided to suit purchasers. 



Three Cabinets containing — 



Minerals, Fluors, Quartz, Agates 



and Precious Stones (including a valuable 

 collection of Bristol Ouartz on Iron and (Quartz 

 on .\gate). 

 Two Cabinets containing Devonian and Bristol — 



Madrepores (polished). 



A collection of — 



Foreign Marbles (polished). 



A large collection of — 



Paris Basin Fossils and Miocene. 



Tliree Cabinets of— 



Corals and Fossils, from every Formation- 

 A complete collection of the following Shells — 



Unionidae, 

 European Helicidae, 



Do. Paludinidae, 



Do. Melanidae. 



Also a collection of — 



Tropical Land Shells, and of 

 Mediterranean Marine Shells. 



A fine collection of Polished Foreign Woods, 



Dctaihd paiiii'tilars on Applii:ation. 



X-RAY APPARATUS 



Of the Highest Quality and Finish only. 



As sitpplied by us to II .M. GofcrniiirHt and the leading Hospitals aiid 

 X-Ray M'oi-kcrs throufrhout the xoorid. 



We are the actual Manufacturers , and Guarantee 

 every Coil against breaking down. 



Ii^~ Call or Write for our New Illustrated List, with 

 Testimonials and plainly worded Illustrated In- 

 structioiis upon how to work in Radiography. 

 Post free to Readers of " Science-Gossip." 



HARRY W. COX^ Ltd.^ 



lO, 11, 28, Cursitor Street, 



CHANCERY LANE, LONDON. 



/\adii>i;rap/is taken for Sdenlifir and Rledical 

 Men, and Demouslrutions i^i7'en. 



TRILOjBITES 



From the Upper Silurian of Dudley. 



Phacopscaudatus, is. 6d. to 15s. 

 Acidaspis coronata, 2s. to 4s. 

 Calymene Blumenbachii, s^s. to 

 . I2S. 6d. 



PliacopsDowiiing-ia:, is.6d. to.s-N 

 Encrinurus \ariolaris, is. 6d. to 



js. 6d. 

 Homolonotus, 3s. 6d. to 7s. 

 A few Cpper Silurian Crinoids, Corals and Bracliiopods. 



Collections to Illustrate Geology and Physiography. 



Catalogues J'ost Free. 



THOMAS D, RUSSELL, Mineralogist, 

 78, Newgate Street, London, E.G. 



.V,';i' Ready. Xe. JJ. 



Is. 



THE SCIENTIFIC ROLL. 



Climate : Ba7-ic Condition. To be eoinpicied in f6 Numbers. 



CONDLCTED Bv ALEXANDER RAMSAY. 

 Prospectuses and Subscription Forms free by post on applica- 

 tion to the Publishers. 

 A few of Nos. I to li! still in print, price is. each. 



The Geological Time Papers and Charts. No. 1. The "R" 



Geolog-ical Time Scale, price id. Nos. o to 3 Charts, 3d. each. 

 Post free. id. extra. Now Ready. 



London: O'DRISCOLL, LENNOX &. CO., 



I-'riiiter^ and Fublis/iers, 



10 & 12, Elephant Road, Elephant ^ Castle^ 



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