TEXT-BOOKS OF SCIENCE. 
In small 8vo., with 372 Figures on Wood, price 6s., cloth, 
SYSTEMATIC MINERALOGY. By Hilary Bauermann, 
^ F.G.S., Associate of the Royal School of Mines. (Forming one of 
Messrs. Longmans & Co.’s Series of Text-Books of Science, Mechanical and 
Physical , edited by C. W. Merrifield, F.R.S.) 
London: LONGMANS & CO. 
Crown 8vo., Price is. 
LIFE AND MIND: 
ON THE BASIS OF MODERN MEDICINE. 
BY ROBERT LEWINS, M.D. 
WATTS & CO., 84, Fleet Street, London. 
SOLAR PHYSICS. 
T HE following COURSE OF LECTURES will be given by Members of 
the Committee on Solar Physics appointed by the Lords of the Committee 
of Council on Education : — 
Six Ledtures on Spedtroscopy in relation to Solar Chemistry. By Mr. J. 
Norman Lockyer, F.R.S. , 4th, 6th, nth, 13th, 18th, and 20th May. 
Three Ledtures on the Photography of the Infra-red of the Spedtrum in its 
application to Solar Physics. By Captain Abney, R.E., F.R.S., 25th and 
27th May, and 1st June. . 
The Ledtures will be delivered in the Ledture Theatre of the South Kensington 
Museum, at 4 p.m., on the days stated above. 
Admission will be by Tickets, which may be obtained as far as there is 
room on application, by letter, to the Secretary, Science and Art Department, 
South Kensington, S.W. 
For Electric Bells, Indicators, 
and everything appertaining to 
ELECTRICAL ENGINEERING, 
Apply to 
JULIUS HINTZEj Electrician, &c., 
EAGLE HOUSE, EAGLE WHARF ROAD, N. 
