SOLAR PH YSI CS. 
By A. H. tSWINTON, 
Member of the Entomological Societies of London, New York,, 
and Stettin ; Correspondent U.S. Ent. Commission, &c. 
Price 7 s. 6 d , in Ornamental Cover, Illustrated. 
“ The table of Sun Cycles is explained, and with a clear a PP re J*f“ s ‘°JJ ?J 
this the reader can post himself up in knowledge, the mere ideao w 
have stunned his ancestors.”— Surrey Advertiser. :„~ rpa c P and 
“ Allow the Sun spots to have a definitely recurrent period of . 10C ”f“ * 
decrease, many observers have traced a corresponding cycle in the occwn&u: 
of heat waves, earthquakes, tempests, floods, abundant crops, 1 
destrudive inseds, &c ."—Journal of Science. „ mn .. n , n r 
“ Mr. Swinton has here expended on this research an immense amount o 
time and labour. The influence of the solar spots has been suspee e 
greatest minds of the age.’ — Liverpool Mercury. ■ „ 
“ The subject is one of great interest, and is deserving of public attent.on. 
— Glasgow Evening Times. 
London : W. H. ALLEN & CO. 
Monthly, One Shilling. Post free, 14s. per annum. 
THE 
ILLUSTRATED SCIENCE MONTHLY. 
A Popular Magazine of Knowledge, Research, Travel, and Invention . 
Edited by J. A. WESTWOOD OLIVER. 
Contains articles by the most eminent writers on Economics, Geography 
and Travel, Rural Affairs, Gardening, Farming, Forestry, Health, Astronomy, 
and Meteorology, Mathematics, Physics, Photography, Chemistry, Microscopy, 
Botany, Entomology, Zoology, Anthropology, Geology, Archaiology, Numis- 
matics Engineering, Technology. Amateur Mechanics, Turnery, Workshop 
AppHancesTNovelties of Invention; and deals, in fad, with every branch of 
Science in the widest sense oi the term. . r _ . .. « 
New Books are reviewed, an i an exhaustive “ Chronicle of Science places 
on record all interesting items 01 news. A portrait of an eminent Leader of 
Science is given each month, together with a brief biography. A department 
under a responsible editor is devoted to Chess. . . , 
The Illustrations are made a special feature, being more profuse in number 
and beautiful in execution than has ever before been attempted in a scientific 
^‘‘Fdlof scientific interest, and especially remarkable for the clearness and beauty of its 
illustrations.” — Illustrated London Sews. 
“ The contrlbutors'are of the first rank, and the subjeas are treated in a popular manner. 
1 — Munches er Evening Sews. »» v ft D iilv Mail 
“ A more inviting m .gaz.ne v/e have rare y seen -N.B.DaUy Mali. 
« xhe best and cheapest science periodical published. —Modem Society. 
Volume I., handsomely bound in cloth, price 6s. 
London: DAVID BOG UE, 3, St. Martin’s^ Place, Trafal ga r Square. 
To Authors, Editors, Lecturers, Publishers, &c. 
TV T NUSCRIPTS prepared for Press. Compilations, Abstrads, and 
^ F cm e 1 gw* 6 S <me?nt 1 ft c Works, Memoirs, Patent-Specifications, &c., 
tran Spedkl facilities for Biology in all Its branches, and for Chemical Tech- 
nologJ ' Distinguished References. 
Address “Confidence,” Office of the Journal of Science, 3, Horse-Shoe 
’ Court, Ludgate Hill. E.C. 
Alicommun c Uions respecting the Advertisement Department to be addressed 
A t0 Mr . THOMAS BLYTON, at the Office,!, Horse Sh, e C t urt, I udgate 
Hill, London, E.C. 
