The Intellectual Rise in Electricity, New York, 1895. This is a popular account of the progress in the field of electricity from Gilbert to Franklin.

Radium and all About It, by S. Bottone, London, 1904. Published by Whittaker & Co. Price is. "An accurate account of the most important phenomena."—Nature, June, 1904.

The Physical Review. A monthly journal of experimental and theoretical physics. Published for Cornell University by the Macmillan Company. 263

Theory of Heat, by Thomas Preston, F.R.S. Second edition just out. Macmillan & Co., 185.

VII.-CHEMISTRY

American Chemical Journal. Edited by Ira Remsen, president of Johns Hopkins University. Published monthly at Baltimore, Maryland. Price $5 per annum. A strictly technical journal.

Bacon, Roger.

Mirror of Alchemy, and Admirable Power of Art and Nature, London, 1597.

Berthblot, P. E. M.

Introduction a l'étude de la chimie des anciens et du moyen age, Paris, 1889.