REMEWS
I. DIE BEZIEHTMQEN Z w r s w x PE'LANZE UND TLER DI h m T E DER cI1E:nh. By Prof. Tscl~irch. BIOMOISCHEX BEDEUTUXQ UES EIWEISS. By W. KUSTER. Pp. 18, rcspcctivcly Part I1 nnd Part III of Biochemischc Tngcsfragcn, Stuttgart : If'isscnschnftliclic Vcrlagsgcscllschnft, 1024. Both thesc pamplileta arc lectures dclivcred t o n gencral scientific niidicncc ; they are, therefore, of a populnr noturc. Thc fornicr dcals with parasitism and symbiosis, and insists on tlic impossibility of animnl l i e without bnctcrin. Tlic lnttcr tliscusscs thc chemistry niitl iiiiportnnce of the proteins. Pp. 22. n. V O X CIIENZSCIIEN IVESZK UXD DER G . BAROER BSOIXIEXTE DES JIF;sSCllES UXD 1)EK'fLFRE SEIT 1914. BY fins IfAURO\VITZ. pa!% A ~I , \'ISSES-SCIIdFnlC!lf E FORSCllUSOSBERICllTE (NATUR-\YISSEXSCIlA~LICIIE REITIE), CditCd by DR. R. E D . LTESECAXG. PI). SG tllitl 148. I)msdcIi nnd Lcipzig : Thcoclor Stcinkopff, 1026. Price, pnpcr 7 iiinrks, bound S.20 marks. 'l'iic sninll book uiidcr rcvicw illustrntcs tlic ilctivity of a wcll.h~o\iii publisl~cr of works 011 colloidal chemistry, who lins now starkd two wries of woiiobmphs, tlic one on pure scic~icc, nbovc rcfcrmd to, iiiid the otlicr (Portschrittc dcr chcmi.sc1icn 'l'cch-