352 THE ANALYST. REVIEW. THE ANALYSIS AND VALUATION OF OXIDE OF IRON AND LIME FOR THE PURPOSES OF GAS PURIFICATION. By H. LEICESTER GREVILLE, F.I.C., etc. (Published by Walter King. Price 2s. 6d.) This pamphlet contains a record of the processes used for the valuation of some of the raw materials used in a gas-works, and the spent products and residuals derived therefrom. As chemist to the Commercial Gas Company, the author had exceptional opportunities of putting to the test the processes of examination which have been suggested from time to time, and in this pamphlet describes those that he adopted, a8 well as those of his own suggestion. The pamphlet contains very few mistakes, and indicates that a more compre- hensive work, free from debatable opinions, from the pen of this author, would be of considerable service to his colleagues. W. J. D.