336 



SCIENTIFIC NEAVS. 



[April 6, li 



DIARY FOR NEXT WEEK. 



Monday, April 9. — Society of Arts, Cantor Lecture, at S p.m. 

 — Alilk Supply^ and Biittar and Cheese 

 Making ; By Mr. Richard Bannister. 



Society of Chemical Industry, at 8 p.m. — 

 The Present Position and Pi ospecis of the 

 Coal Gas Industry ; By M r. Lewis T. 

 Wright. 



Victoria Institute, at S p.m. — Investigations 

 on the Scienee of Language and Ethno- 

 graphy ; By Professor Leitner. The 

 Glacial Period on the East Coast of 

 Canada; By Professor Honeyman, 

 D.C.L. 



Aristotelian Society, at 8 p.m. — Ileraclitus 

 and his Philosophy ; Dr. Clair J. Grece. 

 Tueslay, Apiil \o. — Royal Institution, at 3 p.m.— yi)/4« A'«.f/{:zn ; 

 By Dr. C. Waldstein. 



Royal Colonial Institute, at S p.m. — South 

 Africa ; By Sir D. Currie. 



Institution of Civil Engineers, at 8 p.m. — 

 Compressed Oil Gas, and its Appliances ; 

 By Mr. A. Ayres. 

 Wednesday,] April 1 1. — Society of Arts, at S p.m. — Recent Legislature 

 concerning the Polhition of Air and 

 M'afcr; By Alfred E. Fletcher. 



Sheffield Pharmaceutical and Chemical 

 Society. — Fer7nentatioii ; By F. Spurr. 



Cardiff Amateur Photographic Society. — 

 Platinotype Printing Practically Demon- 

 strated ; By Mr. S. W. Allen. 



Civil and Mechanical Engineers' Society, at 

 7 p.m. — Theatres and other Public Build- 

 ings ; By Mr. Walter Emden. 



Royal Microscopical Society, at 8 p.m. — 

 Fusoldi's Test Plates; By Dr. R. H. 

 Ward. 

 Thursday, April 12.— Royal Society, at 4.30 p.m._ 



Society of Telegraph Engineers and Elec- 

 tricians, at 8 p.m. 



Royal Institution, at 3 p.m. — The Chemical 

 Arts ; By Professor Dewar, F.R.S. 

 Friday, April 13. — Society of Arts. Indian Section, at 8 p.m. — 

 The Experience of Twenty Years i?i Con- 

 ducting Agricultural Inquirie! in Southern 

 India ; By Mr. W. R. Robertson, M.R.A.C. 



Royal Institution, at 9 p.m. — The Pygmy 

 Races of Men ; Professor Flower. 



Institution of Civil Engineers. Students' 

 Meeting, at 7.30 p.m. — [oy^s Valve-Gear 

 Applied to Locomotives ; By H. Hawkshaw 

 Carrick. 

 Saturday, April 14. — Royal Institution, at 3 p.m. — The Later 

 IVorks of Richard \fagner; By Mr. C. 

 Ambruster. 



Physical Society, at 3 p.m. — On the Measure- 

 ment of the Electro-Motive Force of 

 Dynamos ; By Professors W. E. Ayrton 

 and J. Perry. On the Variation of the 

 Co-Efficients of Induction ; By Mr. W. E. 

 Sumpner. Some Experiments on Soap 

 Bubbles ; By Mr. C. V. Boys. On Electro- 

 Motive Forces by Contact ; By C. V. 

 Burton. 



SALES. 



The Charge for Advertisements in this Column is Sixpence for the 

 first sixteen words, and Sixpence for every succeeding eight words. 



Advertisements for this Cohimn should be received by first post on 

 Tuesday to insure insertion in the following number. 



Electro - Plating and Gilding successfully taught. Every 

 lequisite supplied. — Address, Henkic, 234, Great Colmore-street, 

 Birmingham. 



Practical Hints on Electro-Plating, etc. — i stamp. — 

 Address, Henric, 234, Great Colmore-street, Birmingham. 



Meerschaum and Briar Pipes repaired, mounted, or cased ; 

 ambers fitted. — W. George, 324, Essex-read, Islington, London. 



Trouser Lengths, Ss-, Cheap Cloth for Ladies' Dresses, 

 Mantles, Suits. Patterns free. — Hewitt, 27, Winfield, Leeds. 



Dynamo, izo-candle power, improved armature, loos, i'loto. 

 5 stamps. — D. Walton, Hebden Bridge, Yorkshire. 



Dynamo, 60-candles, improved armature, 45s. ; photo. 5 stamps 

 Castings, lamps, etc. ; wire from is. 4d. per lb. 



Dynamo, 30-candles, 2Ss. ; lo-candles, 203. Photo. 5 stamps 

 each — D. Walton, Hebden Bridge, Yorkshire. 



Large Assortment of Lathes, Planers, Drilling, Milling, 

 and various new inventions and tools. — Britannia CoMrANY, 

 100, Houndsditch, London — All Letters, Britannia To< 1 Factory, 

 Colchester, England. Makers to the British Governmeni^ 



Nevi? Book on the Lathe, with notice of new appliarcis, metal 

 spinning, miUing, etc., in an ordinary lathe ; 3s. pos: free. — 

 Britannia Company, Colchester. 



Minerals. — 12 named specimens, 2s. free ; 12 lias fossils, 2s. 6d. 

 — Chas. Wardingley, 30, Elackwoo.d Crescent, Edinburgh. 



Patents. — Nine months' protection, 50s.; patent completed from 

 £(> 10s.— P. M. Rogers, 21, Finsbury Pavement. 



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 every succeeding eight words, 



Adve7-tisement! for this Colutnn should be received by first post on 

 Tuesday to insure insertion in the following nvviber. 



Models, Scientific Apparatus, Tools, or Machinery taken 

 in e.>:change for new goods or work done 10 order.- Butler Bros. 

 44, Elsden-ioad, Tottenham, London, 



SELECTED BOOKS. 



Encydopcedia Brilannica. Vol. XXIII. (T-Ups.) Edited 

 by W. Robertson Smith, LL.D. Containing 625 

 articles. Edinburgh : Adam and Charles Black. 

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Emydopcedia Britannica. Part 89 (T-Thackeray). Part 

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 Part 92 (Turkey-Upsala). Edited by W. Robertson 

 Smith, LL.D. Edinburgh : Adam and Charles 

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Eledric Light Arithmdic. By R. E. Day, M.A., Evening 

 Lecturer in Experimental Physics at King's College. 

 London : Macmillan and Co. Price 2S. 



Tlic Long IV/iiie Mountain ; or, a Journey in Manchuria 

 With an account of the History, Administration and 

 Religion of that Province, with ten full-page illus- 

 trations, a map, and 28 illustrations in the text. 

 By H. E. M. James, of Her Majesty's Bombay Civil 

 Service. London : Longmans, Green and Co. 

 Price 24s. 



The Fundamental Principles of Chemistry practically Taught 

 by a New Method. By Robert Galloway, M.R.LA., 

 F.C.S. London : Longmans, Green and Co. Price 

 6s. 6d. 



Granites and our Granite Industries. By Geo. F. Harris, 

 F.G.S., Membre de la Societe Beige de Geologic, etc., 

 with illustrations. London : Crosby Lockwood and 

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Poultry, for Exhibition, Home, and Market. With a 

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 page quarto plates. London : Swan Sonnenschein, 

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The Pleasures of Life. By Sir John Lubbock, Bart., M.P., 

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 London : Macmillan and Co. Price is. 



