SCIENCE.— AD VER TISEMENTS. 



SflCJBly Io[ Psycmc al iiescarcii. 



Officers for 1896. 



President : William Ceookes, F.K.S. 



Vice-Presidents : 



The Eight Hon. A. J. Balfouk, M.P., F.R.S. 



PfiOKESSOR W. F. Bahkett, F.R.S.E. 



The Marijuk of Bute, IC.T. 



Richard H. Hutton. 



PuoFESisOE William James, Harvard, U.S.A. 



Pi'.o:-T.«.soH S. P. Langley, Smithsonian Institution, 



Washington, U.S.A. 

 Lord Ravleigh, F.K.S. 

 The Right Rev. the Bishop of Ripon. 

 Professor Henry Sidhwick. 



THE Society for Psychical Research is engaged in the 

 investigation of the phenomena of Though t-Transfer- 

 euce. Clairvoyance, Apparitions and Haunted Houses, 

 " Spiritualism," etc., and the results are published from time 

 to time in Proceedings and a small monthly Juarnal, lo 

 which Associate Members (dues J:). 00 per annum) are en- 

 titled. The American Branch of the Society desires to ex- 

 tend its membership and cordially invites applicants who 

 should address the Secretary as below. Persons who have 

 . had psychical experiences of any kind are earnestly re- 

 quested' to communicate them directly to the Secretary. 

 The Branch is much in need of funds for the further prose- 

 cution of its work, and pecuniary assistance will be grate- 

 fully welcomed. 

 Iiiformatiun concerning the Society can be ot)tained from 



Richard Hodgson, LL.D., 



Secretary of tin- A tnfi-imn Jiranrh of the Society 

 fur Psi/fhiviil lieseurrh. 

 S Boylston Place, BOSTON, MASS. 



Electric Lighting and Power 

 Distribution 



An Elementary Manual on Electrical Engineering 

 suitable for students preparing for the Preliminary 

 and Ordinary Grade Examinations of the Citj' and 

 Guilds of London Institute. 



By W. PERREN MAYCOCK, M.I.E.E. 



Third Edition, thoroughly Keriscd and Enlarged. [In. 

 Two ] 'olmnes. ) 



Vol. I. — AVith Numerous Questions and Exercises, 

 including all those set tor the Preliminary and Ordi- 

 nary Grade Examinations since 1890. 231 Illustra- 

 tions, Index, and Euled Pages for Notes. 

 iztno, clotb, $1.75. 



THE MACMILLAN COMPANY, 



66 Fifth Avenue, NEW YORIC. 



Horsford's Acid Phosphate 



with water and sugar only, makes a 

 delicious, healthful and invigorating 

 drink. 



Allays the thirst, aids digestion, and 

 relieves the lassitude so common in 

 midsummer. 



Dr. M. H. Henry, New York, says: "When 

 completely tired out by prolonged wakefulness 

 and overwork it is of the greatest value to me. 

 As a beverage it possesses charms beyond any- 

 thing I know of in the form of medicine." 



Descriptive pamphlet free. 



Rumford Chemical Works, Providence, R. I. 



Beware of Substitutes and Imitations. 



NEW CATALOGUE. 



We have recently issued a new edition, revised and 

 enlarged to 64 pages, of our Catalogue of 



Books on Chemistry, Chemical 

 Technology in Physics. 



It is arranged by subjects, and includes all the 

 standard boolcs in Chemical and Physical Science, as 

 well as the recent literature up to date. 



A copy of this Catalogue will be sent free by mail 

 to any address. 



D. Van Nostrand Company, 



Piiblishers and Importers of Scientific Books, 



23 Murray St. and 27 Warren St., New York. 

 JUST PUBI.ISHEP. 



IlffDUCTIOl^r GOILS. 



Send tor Descriptive Circular. 



SPON & CHAMBERLAIN, Publishers, 



12 CORTLANDT ST., NEW YORK. 



"MINERALS AND HOW TO STUDY THEM." 



Prof. E. S. DANA'S new book for beginners in Mineralogy simplifies tlie science and makes it a 

 fascinating study. To quickly introduce the work we ofler it at 20 per cent, discount to 

 readers mentioning this journal, viz., $1.20, postage zoo. extra. For COLLECTIONS OF 

 MINERALS to illustrate the book send for our special circular. 



12-1-page Illustrated Catalogue, 25c. in paper, 50c. in cloth. 



■J-l-page Illustrated Pi-ice-Lists, 4c. ; Bulletins and Circulars Free. 



GEO. L. ENGLISH & CO., Mineralogists, 64 East 12th St., New York. 



