This day is published, 8vo., cloth, 383 pages, with 88 illustrations drawn to 
scale, is. 
A TREATISE ON THE 
DISTILLATION OF COAL-TAR & AMMONIACAL LIQUOR 
AND THE 
SEPARATION FROM THEM OF VALUABLE PRODUCTS. 
By GEORGE LUNGE, Ph.D., F.C.S., 
Professor of Chemistry in the Federal Polytechnic School, Zurich, 
Author of “ A Theoretical and Pra&ical Treatise on the Manufacture of 
Sulphuric Acid and Alkali.’’ 
JOHN VAN VOORST, 1, Paternoster Row, 
THE FUEL OF THE SUN. 
By W. MATTIEU WILLIAMS, F.R.A.S., F.C.S. 
8 vo., Cloth, Price 7 s. 6 d. 
The Author endeavours to demonstrate that the atmosphere of our earth is 
but a portion of the universal medium of space which the earth has accumu- 
lated by its gravitation. The atmosphere of the Sun is calculated on this 
basis, and it is shown that the original evolution of solar light and heat is a 
necessary consequence of the atmospheric accumulation due to his gravitation. 
A continual supply of fresh solar fuel is further shown to result from the 
combined a&ion of planetary disturbance and the Sun’s motion of translation ; 
and thus both the origin and the maintenance of solar and stellar heat and 
light are explained. 
All the details of photospheric phenomena, — the spots, the faculae, the 
mottling “ granulations,” &c., &c., follow as incidental consequences ; as also 
the prominences, the corona, the zodiacal light, and the zones of meteors and 
aerolites. 
The atmospheres of the planets are calculated on the same basis ; and this 
reveals a consistent explanation of the observed meteorology of the inferior 
planets, the surface phenomena and specific gravity of the superior planets, and 
the rings of Saturn. 
The phenomena of the nebulae are shown to be necessary results of the 
atmospheric accumulations of certain modifications of star clusters, or great 
solar systems ; and an explanation of the connection between solar phenomena 
and terrestrial magnetism is suggested. 
The whole argument is based upon known and well-established fads, and 
unaided by any hypothetical assumptions of imaginary materials or forces. 
London : SIMPKIN, MARSHALL, & CO. 
To Authors, Editors, LedTurers, Publishers, &c. 
M ANUSCRIPTS prepared for Press. Compilations, Abstracts, and 
Critiques supplied. 
Foreign Scientific Works, Memoirs, Patent-Specifications, &c., 
translated. 
Special facilities for Biology in all its branches, and for Chemical Tech- 
nology. 
Distinguished References. 
Address, “Confidence,” Offices of the Journal of Science ,3, Horse-Shoe 
Court, Ludgate Hill, E.C. 
All communications respecting the Advertisement Department to be addressed 
to Mr. THOMAS BLYTON,a* the Office , 3 , Horse Shoe Court, Ludgate 
Hill, London , E.C. 
