504 



SCIENTIFIC NEWS. 



[May 25, 18 



SALES. 



Thi Charge for Advertisements in this Column is Sixpence for the 

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



Advirtisements for this Cobimn should be received by first fost on 

 Tuesday to insure insertion in the following number. 



Large Assortment of Lathes, Planers, Drilling, Milling, 



and various new inventions and tools. — Britannia Company, 

 100, Houndsditch London. — All letters, Britannia Tool Factory, 

 Colchester, England. Makers to the British Government. 



New Book on the Lathe, with notice of new appliances, metal 

 spinning, milling, etc., in an ordinary lathe ; 3s. post free. — 

 Britannia Company, Colchester. 



Chisel Steel, i to 5 feet bars, | to ij octagon, 13s. per cwt.— 

 Gilbert, Oxford Road, Sheffield. 



Best Cast Steel for tools, taps, and dies, drills, 6d. per lb. — 

 Gilbert, Oxford Road, Sheffield. 



Electro - Plating and Gilding successfully taught. Every 

 requisite supplied. — Address, Henric, 234, Great Colmore-street, 

 Birmingham. 



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

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



Dynamo, 120-candle power, improved armature, iocs. Photo. 

 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-candIes, 28s. ; lo-candles, 20s. Photo. 5 stamps 

 each — D. Walton, Hebden Bridge, Yorkshire. 



Meerschaum and Briar Pipes Repaired, Mounted, or cased, 

 ambers fitted. — W. George, 324, Essex Road, Islington, London. 



Fretwork, Carving, Turning, Woods, Tools, and all 

 requisites. Catalogue with 700 illustrations, 6 stamps.— Harger, 

 Bros., Settle. 



Second-hand Lathes, and other tools, offered cheap ; on 

 view, Britannia Co., 100, Houndsditch, London, — Send 2 stamps 

 for list, to Britannia Works, Colchester. 



" Inventors' and Manufacturers' Patent and Trade Mark 

 Pocket Guide," by G. C. Marks, C.E., 13, Temple Street, 

 Birmingham. Four stamps. 



5in. Burnishers, 7s. 6d. 1 Silver steel bar, warranted : 6i in., 

 I2S. 6d. ; 9 in., 20s. ; 15 in., 4CS. — C. C. Vevers, Horsforth, 

 Leeds. 



Photographic Specialities, cheap and good. — Stills, head- 

 rests, backgrounds, washing machines, lamps, shutters, etc. Lists 

 free.— C. C. Vevers, Horslorth, Leeds. 



Mica or Talc cut for all purposes. Mica chimneys. Mica 

 covers, etc. — C. Johnson, 87, New Oxford Street, W.C. 



Patterns. — 100 Fretwork, 100 Repousse, 200 Turning, 300 

 Stencils, is. each. — Collins, Summerlays Place, Bath. 



" Dynamo Construction," illustrated treatise, is. Price lists 

 dynamo-castings for stamped envelope.— Alfred Crofts, Dover. 



Named Minerals, Fossils (Carboniferous Lias), twelve, 

 free, 2s. 6d. Polished minerals, from 6d.— C. Wardingley, 

 Blackwood Crescent, Edinburgh. 



Tandem and Cripper Frames, Diamond and Cross-Pattern 

 Safety Frames. F ittings of all kinds at lowest pri es. — Trent 

 Cycle Co., Nottingham. 



EXCHANGES. 



Exchange Notices will be inserted in this Column at the rate of • 

 Sixpence for the first twenty four words, and Threepence for 

 every succeeding eight words. 



Advertisements for this Column should be received by first post on 

 Tuesday to insure insertion in the following nufnber. 



Splendid Solar Microscope, in case, by Naime, six powers. 

 Exchange photographic apparatus.— RiDOUT, Sunbuiy Common. 



100 Geological Specimens, named. Exchange, los. 

 Approval. — Holden, Hoyland Nether, Barnsley. 



SELECTED BOOKS. 



Forms of Animal Life. A Manual of Comparative 

 Anatomy, with descriptions of Selected Types. By 

 the late George Rolleston, D.M., F.R.S. Revised 

 and enlarged by W. Hatchett Jackson, M. A. Second 

 Edition. London : Clarendon Press Warehouse. 

 Price 36s. 



A History of Photography. Written as a Practical Guide 

 and an Introduction to its latest Developments. 

 With an Appendix by Dr. Maddox on the Discovery 

 of the Gelatine-Bromide Process. By W. J. Harrison. 

 London : Triibner and Co. Price 3s. 6d. 



Manual of Artistic Anatomy. For the use of Students in 

 Art. By John C. L. Sparkes, Principal of the 

 Government ! National Art Training School, South 

 Kensington Museum. Illustrated. London : Bailliere, 

 Tindall, and Cox. Price ys. 6d. 



Henslow's Botany for Beginners. A Short Course ot Ele- 

 mentary Instruction in Practical Botany, for Junior 

 Classes and Children. By the Rev. Professor G. 

 Henslow, M.A., F.L.S., F.G.S., author of " Floral 

 Dissections," Lecturer on Botany at St. Bartholo- 

 mew's Hospital Medical School, Examiner in Natural 

 Science for the College of Preceptors, etc. 20 plates. 

 Fourth edition. London : E. Stanford. Price 2S. 6d. 



Electricity and Magnetism. By the late Thomas Dunman, 

 revised and completed by Chapman Jones, F.I.C., 

 F.C.S. With explanatory engravings. London : 

 Ward, Lock, and Co. Price is. 



Select Biological Memoirs. Memoirs on the Physiology of 

 Nerve, of Muscle, and of the Electrical Organ. 

 Translated under the superintendence of and edited 

 by J. Burdon-Sanderson, M.D., F.R.S. London : 

 Clarendon Press Warehouse. Price 21s. 



METEOROLOGICAL RETURNS. 



For the ten weeks ending on Monday, May 14th, 1888, specially prepared for Scientific News from official reports. 



The highest temperature reading during the last week of the period was 73 degs. at Strathfield Turgiss, England, South. 



