N E W BOOKS 949

maker.” T h e work is essentially a resume of a series of articles which appeared in the International Sugar Journal.

Introductory remarks on the meaning of chemical control, on the role of the chemist i n the sugar industry, and on chemical control without a chemist, are followed by a detailed discussion of the practical methods of the chemist, aud of simple methods of chemical control.

The author clearly outlines and explains the value of a chemist’s service on a plantation ; to use his own words : “the chemist’s duty is to acquire knowledge in the laboratory in order that he may advise in the factory. “Nigger-driving requires no technical skill, and may be better performed by others.” And again, in speaking of the importance and need of soil-snalysis, etc., Heriot says : “The delicate balance of the chemist is less liable to err than the planter’s judgment.”

The book is primarily ititended for use i n tropical and sub-tropical countries and preference is expressed for Brix hydrometers graduated at “a meau tropical temperature of 84’ F.” I t is therefore rather surprising that no reference is made to the important influence of temperature con- ditions in the graduation and control of polariscopes, a matter so fully discussed within recent years by the International Commission for Uni form Methods of Sugar Analysis.

I t would also have been well to have mentioned (p. 5 7 ) , that the nor- mal weight of sucrose there cited, 26.048 grams, must be dissolved up to 103 Mohr cubic centimeters, even if the author should deem it best to make no reference to the equivalent sucrose solution-the normal sucrose solution now in general use, prepared by dissolving 26.000 grams of su- crose up to IOO metric cubic Centimeters.

T h e meaning of the term “Non-chemical sugar” (p. 72) is unknown to the reviewer; if it be intended as an equivalent for “Organic non- sugars,” the term is certainly open to criticism.

The chapter in the optical test is exceptionally well written, the author has certainly succeeded in giving a most lucid popular exposition of pol- arized light and of the polariscope. I n fact the style of the book is good throughout-clear and concise, and the volume should certainly appeal to the practical man, to “ the practical sugar man,” for whom it is, in the first place, intended. F. G. WEICHMANN. THE VALCE O F P r R E \v’ATER, GEORGE e. WHIPPLE, JOHS \\‘II,EY 8r SOSS,

PRICE $1.00.

This book is a timely contribution to the ethics as well as the economics of municipal undertakings. Responsibility for dangerous sanitary con- ditions is fast being placed where it belongs-upon that portion of the community which knows the remedy whether it be legal or educational.

This little book with its clear and convincing statement, its suggestive statistics, its rating of the financial value of human life should be in the

950 R E C E N T P U B L I C A T I O S S

haiids of every town official, in every public library, in everv school library, in short, should be within the reach of every intelligent voter. The tone of the book is strictly scientific in that it claims not to be infal- lible but only to point in tlie right direction, which is, that the introduc- tion of clean and safe water has benefited every community financially, sometimes far above the cost of the plant. Also, that there niay be a money value in the esthetic appreciation of the appearance of the water supply apart from its safety; both together being quite sufficient to war- rant the extra cost of filtration. I t is thereforeof the utmost iiiiportance that the average citizen should have the iiieans of foriiiing his own jL1dg- merit on such Iiiuiiicipal expenditures. This little book gives him in direct, untecliiiical language just what he needs.

The clefiiiitions of terms applied to water and the statements in regard to hard water and its effects are alone Forth the price of tlie book.

ELLEX H. RICHARDS.

R E C E N T PUBLICATIONS. . \ I , L ~ ; S ~ *\LFRED €1. A X D TAXKAI~I ) , -\KNOI.I). R . : Co>rxiii<c 1-41. OKGAXIC AN.41,-

vsrs. 3rd edition, rewritten and revised by the author and A . I<. Tankard. 1‘01 2 .

pt. 3 . (.\cid derivatiyes of phenols, aronlatic acids, resins and essential oils). Phila- delphia : P. Rlakiston’s Son Sr Co. rgoj. Svo. $j.

BOVR, E. K L ~ R Z E R XBRISS D E R S P E m n o s K o r w UND C o r , o ~ r ~ r ~ : r n r ~ : . Leipzig : rg r~7 . 122 ss. hl . 6.

I~LvI”, A. IV. AXD SI. M‘.: POISONS ; THEIR E m e c r A X ~ I D tion. rewritten and enlarged. S o l pp. hi. 2r.60.

J . H. I’an’t Hoff. j, huflage, besorgt voii E. Colien. 1,eipzig : rgo;. 163 ss. M. 4.

ods of testing arid use. S e w York : D. Van Sostrand Co. 190;. 20s p. Yvo. $5.

AX.\I,YSE. Erlangen : 1907. gr . S. 76 5s. 31. 2 .

HANDBUCH DER C H E M I S C H E N TECHXOLOGIE. In Verbindung rnit mehreren Ge- lehrten und ’rechilikern bearb. unci herausgegangen von D. B P. A. Poller und IC. Birnbauui. Nach den] Tode der Herausgeber fortgesetzt voii Prof. Dr. C. Engler. 111 Rds. z Gruppe. Rraunschweig.

HERIOT, T. H . P.: SCIESCE IS S u c a ~ PRODUCTIOX. AII introduction to the methods of cheriiical control. Manchester, Eng. 1907. roq p. Svo. 6 s.

beitete von. Edward Cramer wid Dr. Herm. Hecht. 1588 ss. 190:. 11. 45. Lalir,.%Nc, MAX JULIUS L. : A TEXTBOOK OF EI,ECTKOCHEMISTRP. Translated

from the 4 th German edition by IVillis R. 1Vhitney and J. LV. Brown. Sew York . Macniillan. 1907. j 4 -C 33s p. Svo. $2.60 .

MATTHRWS, Jos. NEKRITT : THE TEXTILE FIBRES : their physical, rnicroscopica. and cheniical properties. j d edition, rewritten. S e w I’ork : Johii LI’iley Sr Sons. 1907. 48s p. Svo. $4.

N’INTOSH, JOHX GEDDES : IrDvs’rnIar. .II.COHOI,. The production and use of alcohol for industrial purposes and for use as an illurniiiaiit and as a source of motive power.

I,oi~doii : 1906. N D EV ENTER, C . &I, : P 11 v s I I: A 1.1 SCH E C H E M I I: F U R .A s I:.\ s GZR . 31 it Vor wort von

FICRXBACH, ROBERT L. : GLUES XSD GELATISIS : a practical treatise on the nieth-

(.;LITBIER, .a. A N D ~ I R C R E S U U S C H , 1,. : P R h K T I S C H E .\Nr,EIT!iNG X1.R GEWICHTS-

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1,ondon : Scott, Greenwood Sr Son. 1907. 246 p. Svo. 7s. 6d.