The Fuel of the Sun. By W. Mattien Williams. (Simpkin
and Marshall.)—We do not know that any one has been seriously discom- posed by the theory, not uncommon among astronomers, that the solar beat and light have diminished in time past, and will Gentian° to diminish. The prospect of our own fuel, here in England, falling short seems much more serious, though the other result, when it did begin to be noticed, would of coarse be infinitely worse. But if there be such a one, he may gather comfort if he can accept the theory which Mr. Williams here propounds, which may be briefly stated thus,—that the sun, continually moving through space, gets fuel from the medium which fills the inter-stellar spaces. He has taken a great deal of pains in considering in reference to this view the many important solar obser- vations which have been made of late, and whether or no he succeeds in commending his theory to the experts, he has certainly succeeded in putting forth a treatise of considerable interest.
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