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NEW BOOKS
rations, illustrative of some of the typical processes of inorganic chemistry for the production of various classes of compounds. T h e general use of the symbol Ani for aniinoniuni throughout this and other works by the same authors seems to lack full justification, and it is still more difficult to justify such inconsistencies in symbols as AniHO, and AmOH, aiid AlAiu(SO,),. 12H,O, and MgKH,PO,.GH,O, which mar the pages of this generally excelleut work. H. P.TALBO~.. ’I‘HE C H I ? l I I S T R Y A N D ’ ~ l i C E I N O 1 , O G Y 01: 3 r l S l : D f’A1STS. 13Y 11.4XIMII.I.iN pp. s y i - 160. h-mv York : D. Vaii Xostrniitl Co. 190;. $3.00 iict.
TOCIi.
There is always a satisfaction in reading a book written by a practical manufacturer, whether one agrees with iiini or not ; he at all events has something definite to say, and says it. hlr. Toch writes simply and directly about paints, their manufacture, materials and use. First there is an excellent chapter on the plan and operation of the factory ; this is followed by full accounts of the pigments i n practical use, which give much interesting information about the newer pigments, concerning which the English books have very little to say. These are not mere physical descriptions of the dry pigments, but include specific information as to their use and value in paint, and are illustrated by sixty niicrophotographic plates. Especially new are the data about sublimed lead, zinc lead white, blue lead, artificial verniillions, and the various fillers, these last being in the author’s opinion entitled to much iiiore consideration than most previous writers have accorded them. T h e paint vehicles are then taken up, and some special paint problems are filially discussed. I n an appendix is the most recent matter about tung oil. T h e author writes from the standpoint of the newer class of paint manufacturers, and sets out clearly the views held by many o i the important makers, and many of the paint chemists as well. There is a chapter 011 analytical methods ; but information of a chemical nature is scattered freely throughout the treatise. T h e book is handsoniely printed and is free from typographical errors of any importance. A. H. S A B I N . PKIXCI171.>2S A K I ) l’R.4CTICE
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