SCIENCE-GOSSIP. 



Just Fubtished. Price ^s. Post Free. 



APPLIED GEOLOGY. 



PART I. 



By J. V. ELSDEN, B.Sc. (London), F G.S. 



Demy Svo, bound in cloth. Profusely illustrated. 



THE QUARRY PUBLISHING CO., LTD. 



5, Arundel Street, Strand, London, W.C. 



MINERALS, ORES, 

 ROCKS, FOSSILS, &G. 



" What they are" and " Wliei-e they are found." 



la this " Elementary Geological Series " are five sets, each set 



■ containing 20 named and located specimens, vnth descriptive 



notes. In cases 11 x 7 x 1^, post free, 3s. 



SET No 26. — " 'iletaUtc MineYals ," contains 20 named Specimens 

 of Metallic Minerals and Ores, in wliichthe pi-incipal groups 

 are represented, including Ores of copper, iron, lead, zinc, 

 tin, &c Zs. 6d. 



SET No. 27. — " Earthy Minerals," contains 20 named Specimens 

 of Earthy IVIinerals, including Fluor, Apatite, Felspar, Talc, 

 Homhlende, &c. ... 2s. 6(i 



SET No. 28. — " I(ineous Rocks ," contains 20 named Specimens of 

 Igneous, "Volcanic, and Metamorphic Eocks, including Obsi- 

 dian, Trachyte, Granite, Lava, Basalt, &c. ... 2s. 6d. 



SET No. 29.—" SecJtmeHtoryJioc/cs," contains 20 namedSpecimens 

 of Sedimentary Jtocks, including Crag, Gault, Oolite, Lias, 

 Limestone, Sandstone, &c 2s. 6d. 



SET No. 30.—" Fossils ," contains 20 named Specimens of British 

 and other Fossils, including examples from Crag, Eocene, 



Gault, Oolite, Carboniferous, &c 2s. 6d. 



T/i8 ahove IQO Specimens of Minerals, post free, 12s. 6d. 



SET No. 58.—" Preeions ston es," contains 20 well-kno^vn examples 

 of stones in use for jewellery and ornamentation, as found in 

 nature, from various parts of the world, -ivith theii- specific 

 localities, &c. Ss. Od., or postjree, 5s. 6d. 



9::^ See Editorial Notice, January No. of " Science-Gossip," 

 3S3S*^ and mite for full Catalogue post free. 



COX & CO., 99 & 101, NEW OXrOED ST., LOITDON 



W. WATSON & SONS' 



' FRAM MICROSCOPE 



A Highest Class Microscope at a very moderate cost. 



Coarse Adjustment. — Watson's dia- 

 gonal rack and pinion. ' 



Fi7ie Adpistment. — Watson's leret 

 form. 



Tripod Foot, with 7-in. spread. 



Stage. — Nelson's horseshoe pattern, 

 31 by 31 in. 



Sodii Length.— 152 mm. With draw- 

 tube extended, 250 mm. Objectiv* 

 thread at lower eud of draw-tube. 



Fittings of universal size throughout. 



Under Fitting arranged to turn out 

 from optic axis when desired. 



PRICES. 



.svf A'," FrAM'" Micro- 

 scope, with one eye- 

 piece, Watson's Para 

 chromatic 16 in. and 

 choice of 1 in. 1 2 in. 

 or 2 3 in., complete 

 in Mahoa-any ease, 

 £6 I5S. 



Set XI. Complete aa 

 per Set X., with the 

 addition of Abbe Illu- 

 miuator having Iris 

 Diaphragm, and ex- 

 tra Eyepiece, £8 5S. 



Full particulars of the ahove, also complete Catalogue of Micro- 

 scopes, forv^arded post free on application to 



W, WATSON & SONS, 



313, HIGH HOLBORN, LONDON, W.C. 

 BranrhP'^— ^ '6, FORREST ROAD, EDINBURGH. 



< 78, SwANSTON St., Melbourne, Australia. 



TRILOBITES 



From the Upper Silurian of Dudley, 



Phacop.'; caudatu?. Is. 6(Z. tolSs. ; Pliacops DowningiEe, l*.6if.to5». 

 Acidaspis ooi'or!ata,2s. to 4s. : Encrlnuru.s variolariR, Is. 6d.to 

 Calvmene Blumenbachii, 5s. to I 3s. 6di 

 12s. 6d. I Homolonotus, 3s. 6(f . to 7s. 



A few Upper Silurian Crinoids, Corals and Braohiopod.s. 



COllECTMS TO ILLUSTRATE GEOLOfiY A\D PHYSIOGRAPHY. 



Catalogues Post Free. 

 THOMAS D. RUSSELL, Mineralogist, 



78, NEWGATE STREET, LONDON, E.G. 



BECK'S NEW 'BRITISH STUDENTS' MICROSCOPES 



Nu. .Si.^Stand, Iris diaphragm 

 and mahogany case, 

 £.2 lis. 6d. 



.Fvll Prices and particulars 

 9t» application to 



No. 55.— Stand, Iris diaphragm No. 56.— Stand, Iris diaphi-agm No. 67.— Stand, Iris diaphi-agm 



and mahogany case, and mahogany case, and mahogany case, 



£3 12s. 6d. £4- 7s. 6d. £5 12s. "6d. 



New One-twelfth Inch Oil Immersion Object Glas.s, N-A VO £4. 



R.& J. BECK, Ltd., 68, Cornhill, London, E.G. 



