. Notizie agricoli. Agricoltura -- West Indies; le malattie delle piante -- West Indies. Vol. XV. No. 381; il settore agricolo NEWS. 397. SULPHITATION IN ZUCCHERO BIANCO di manu- fratturato. Da Francesco Maxwell, Londra: Norman Eodger, 1916. Pp.72. Figg. 8 + piastre in. Price7s.6RZ.net. La penuria di zucchero bianco dal momento che la guerra non è dovuto tanto alla effettiva carenza di zuccheri grezzi come per mancanza di impianti di raffinazione. Questa circostanza conferisce ulteriore impor- tanza per la fabbricazione di piantagione di zucchero bianco. Fino al presente, Java, Mauritius e Louisiana sono gli unici luoghi in cui lo zucchero di canna da zucchero factory è stata

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. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. Vol. XV. No. 381; THE AGRICULTURAL NEWS. 397. SULPHITATION IN WHITE SUGAR MANU- FACTURE. By Francis Maxwell, London: Norman Eodger, 1916. Pp.72. Figs. 8 + Plates in. Price7s.6rZ.net. The shortage in white sugar since the war has not been due so much to actual shortage in raw sugars as to lack of refining facilities. This circumstance lends additional impor- tance to the manufacture of plantation white sugar. Up to the present, Java, Mauritius, and Louisiana are the only places where the sugar-cane factory has been equipped for turning out this grade of sugar ; it is likely, however, that the production of white sugars on the plantation will extend to other places in the future. The present volume constitutes a useful source of infor- mation regarding the simplest form of refining process— Sulphitation. The information given is of a simple character, clearly and conveniently arranged, and should prove extremely helpful to the factory worker. The principal points dealt with are the preparation and properties of sulphurous acid; generating plants and their control; action of the acids on juices; application of sulphitation to juice; and sulphitation of the syrup and molasses. A special chapter is written on the sulphitation process in practice, and a description is given of the process as adopted by the leading white sugar countries. An original feature of the book is the summary, which is in the form of questions and answers. The questions are such as would be asked by the practical worker in his training in sulphitation, and the answers are obviously the replies of an expert thoroughly familiar with the various operations involved. FIXATION OF ATMOSPHERIC NITROGEN. By Joseph Knox: Gurney and .facksons. Chemical Mono- graphs. London, 1914, Price i.s net. This book gives an account of the more important processes for the fixation of atmospheric nitrogen, and more especially of the theory

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