civil i 



NATURE 



{March 20, 1879 



84 pp., with 136 Plates, demy 8vo, cloth, 30J. 



PHOTOGRAPHED SPECTRA. One 



Hundred and Thirty-six Photographs of Metallic, Gaseous, and other 

 Spectra printed by the Permanent Autotj^je Process, with Introduction, 

 Description of Plates, and Index, and with an extra Plate of the Solar 

 Spectrum (showing bright lines), compared with the Air Spectrum. By 

 J. RAND CAPRON, F.R.A.S. 



" . . . . Mr. Capron has earned the thanks of spectroscopists for the 

 large amount of useful work which he has performed for them in the way 

 of preliminary investigation. No exact scale or measurement accompany 

 the photographs, and they will be chiefly useful in indicating by comparison 

 with each other the lines which belong to particular metals, and the con- 

 ditions under which particular lines are produced But although no 



exact measurements are given, and although the photographs vary very 

 "perceptibly in length, nearly all show lines which can be used as reference 

 lines, by measurement from which the wave-lengths of the metal lines can 



be determined The advantages of the photographic method are 



noticed by the author as follows : — ' Absolute truth is everything in spectro- 

 scopic work, and the very best draughtsman working with the most perfect 

 micrometer cannot, even at the expense of a vast amount of labour, equal 

 in accuracy a good photograph of a set of spectral lines.' .... The pho- 

 tographs obtained from the electric light are particularly interesting. This 

 is, as far as we know, the first extensive series of measurements of spectra 

 obtained by the ignition of substances in the electric arc." — Philosophical 

 lHagazine. 



London : E. & F. N. SPON, 46, Charing Cross. 



CHEAPER EDITION, REVISED AND ENLARGED. 



This day is published, price 7^. 6d. 



PROFESSOR JOHNSTON'S 



CHEMISTRY OF COMMON LIFE. 



NEW EDITION. 

 Revised and brought down to the Present Time. 



By ARTHUR HERBERT CHURCH, M.A. OxoN., 



Author of " Food, its Sources, Constituents, and Uses," &c., &c. 



Illustrated with Maps and numerous Engravings on Wood. 



One Volume, crown 8vo, pp. 618. 



Summary of Contents. 



The Air we Breathe— ^The Water we Drink — The Soil we Cultivate — The 

 Plant we Rear — The Bread we Eat — The Beef we Cook — the Beverages we 

 Infuse — The Sweets we Extract — ^The Liquors we Ferment— The Narcotics 

 we Indulge in — The Poisons we Select — The Odours we Enjoy — The Smells 

 we Dislike — The Colours we Admire — What we Breathe and Breathe for — ■ 

 What, How, and Why we Digest — The Body we Cherish — ^The Circulation 

 of Matter. 



WILLIAM BLACKWOOD & SONS, Edinburgh and London. 

 Price 7^. 6d. 



DESCRIPTION OF THE CHEMICAL 



LABORATORIES AT THE OWENS COLLEGE. By Prof. H. 

 E. ROSCOE, F.R.S. From the Plans of Alfred Waterhouse, 

 A.R.A. 



J. E. CORNISH, 33, Piccadilly, Manchester. 



THE ENTOMOLOGIST'S MONTHLY 

 MAGAZINE. 



Price Sixpence, Monthly, 24 pages 8vo, with occasional Illustrations. 



Conducted by J. W. Douglas, R. McLachlan, F.R.S., E. C. Rye, F.Z.S. 



and H. T. Stainton, F.R.S. 



This Magazine, commenced in 1864, contains standard articles and note 



on all subjects connected with Entomology and especially on the Insects of 



the British Isles. 



Subscription — Six Shillings per Volume, post free. The volumes com- 

 mence with the June number in each year. 



Vols. I. to V. (strongly bound in cloth) may be obtained by purchasers of 

 the entire set to date, at the increased price of 10;. each ; the succeeding 

 vols, may be had separately or together, at js. each. 



London: JOHN VAN VOORST, i. Paternoster Row. 

 N.B.— Com.munications, &c., should be sent to the Editors at the aboT« 

 address. 



THE JOURNAL OF BOTANY, 



BRITISH AND FOREIGN. 



Edited by Hknky Trimen, M.B., F.L.S., British Museum ; assisted by 

 S. le M. MocRE, F.L.S., Royal Herbarium, Kew. 



On and after January i, 1878, the JOURNAL OF BOTANY will be 

 printed and published by T. P. Newman, 32, BotolphLane, E.C , to whom 

 Subscriptions for 1878 should be sent. The volume for 1877 (price i6j. 6d., 

 bound in cloth), covers for the volume (price is.), and back Numbers, can 

 also be obtained of Mr. Newman. The Aimual Subscription, payable in 

 advance, is i2f., post free in the United Kingdom, Post-Office Orders 

 payable at EASTCHEAP. 



On the jst of every Month, price Sixpence. 



THE ENTOMOLOGIST: 



AN ILLUSTRATED JOURNAL OF BRITISH ENTOMOLOGY. 

 Edited by John T. Carrington, 

 With the Assistance of 

 Frederick Bond, F.Z.S. I Frederick Smith, F.L.S. 



Edward A. Fitch. I J. Tenner Wbir, F.L.S. 



John A. Power, M.D. | F. Buchanan White, M.D. 



The Entomologist was founded for the purpose of diffusing information 

 with regard to the science generally, and especially respectmg InsecU in- 

 jurious to Farm or Garden ; for Recording the Capture of Rarities ; and 

 for Figuring Varieties. Monthly Lists of DupUcates and DesideraU are 

 published. 



Interesting articles on all branches of the science are promised by leading 

 entomologists. Especial attention is given to the printing of the Woodcut 

 Illustrations, which are numerous. There are occasionally Coloured 

 Plates. 



SIMPKIN, MARSHALL, and CO.. Stationers' HaU Court. 



JOURNAL OF PHYSIOLOGY. 



THE 



CLASSIFIED LIST OF TITLES OF BOOKS AND 



PAPERS , 



On subjects of Physiological Interest published during 

 the year 1878, has been issued to all subscribers. 



Any subscriber not having received his copy is 

 requested to communicate with Messrs. Macmillan. 

 A few extra Copies are Now on Sale, Price 4J. 

 MACMILLAN & CO., London. 



MICROSCOPES, OBJECTIVES, &c. 



CENTENNIAL EXHIBITION. PHILADELPHIA, U.S.A. 



The Medal and Highest Award has been given for Design, 

 Construction, Optical Excellence, and Moderation in Price, to 



HENRY CROUCH, 



66, BARBICAN, LONDON, E.C. 



Fully Illustrated Catalogue and full Instructions by Post, 6 Stamps. 

 Mailed abroad free. 



FLETCHER'S 

 PERFECTED GAS FURNACE. 



The simplest and cheapest of all, both 

 in first cost and in use. Will work with 

 any gas supply 

 from lo to IOC 

 feet per hour, 

 and will fuse 

 with ease sub- MR 

 stances infusi- 

 ble in any 

 known furnace. 



Prices from ^ 



13s. 6d. 

 Fletcher's New Patent Blowpipe & Perfected Mouthpiece. 



Complete 

 Illustrated 



List on 

 Application. 



THOS. FLETCHER, Museum Street, Warrington. 



