A New and Revised Edition, illustrated by 53 Plates, many coloured, and 818- 
Woodcuts, containing figures of 2680 objects. 8vo., cloth, £ 2 12s. 6d. 
THE MICROGRAPHIC DICTIONARY: 
A GUIDE TO THE EXAMINATION AND INVESTIGATION OF 
THE STRUCTURE AND NATURE OF MICROSCOPIC OBJECTS, 
ByJ. W. GRIFFITH, M.D . , &c., and Professor HENFREY, F.R.S. 
Fourth Edition. Edited by Dr. Griffith, assisted by the Rev. M. J. 
Berkeley, M.A., F.R.S., and Professor T. Rupert Jones, F.R.S. 
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 js. 6 d. 
The Author endeavours to demonstrate that the atmosphere o four 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 J 
combined action 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 T 
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- ring? of Saturn. 
The phenomena of the nebulae are shown to be necessary results of the df 
atmospheric accumulations of certain modifications of star clusters, or great 
solar systems ; and an explanation of the connexion between solar phenomena 
and terrestrial magnetism is suggested. 
The whole argument is based upon known and well-established fadts, and 
unaided by any hypothetical assumptions of imaginary materials or forces. | 
London : SIMPKIN, MARSHALL, & CO. 
THE CHEMICAL NEWS 
Edited by WILLIAM CROOKES, F.R.S., &c. 

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and the collateral branches of Physical Science. It also contains an encyclopaedic list of 
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