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Burenu of Stnndnrds nnd wliosc othcr works nrn well known to most clicniists who :ire n t nll conccrncd with iinnlysis. In this book tlie nutliors do not rcpcnt tltc inatter already dcscrihcd in tlic Inrgcr tcstbook of Hillcbrnnd . niid Luiidcll but nim nt siiinitiariziiig iiiformntion as to the bclinviour of all tlic clcmcnts in rclntioii to nnalytical renctioes, and so to. aid the senrch for morc selcct.ive rciigcnts. So tltc book is in soinc respccts unique. Tlic clcmcnts arc dealt with strictly in accordaim wit h thc periodic classificntion and nrc then grouped or xiinrkcd out in nccordancc with tlicir prccipitntioii hy, or solubility in, n specific rcngent. Thcrc is thus givcn n very clear pictiirc of the tiiinilnrity or dissiiiiilnrity of the mrious clciuents as onc passes through the periodic groups, niid i t is a t once apparent mllich elemelits will be includcd or will interfere in ii given procedurc. One vnluablc feature of this trc:itnicnt is t h t nll tlic elciiicnts are included and artificial distinctions such irs .' rnre " clcmcnts disnppcnr. Despitc its compnrntively s d l size, the book iiicludcs qunli tativc scpnrations, grnrimctric, volumetric, potcntiomctric, electrolytic, colorimetric, and spcctroscopic methods nnd an'ords n vduablc guide to tlic underlying principles of cheinical analysis. So far as we have tested the iiicthods they arc thoroughly good nnd well described ; it is, liowcvcr, surprising that thc tnnniu separations of the rnrc cnrth elements so fully worked out by Gchocller arc not mcntioncd. Orgniiic rengeuts arc given tlic cnrcful dcscripbion t h y so well merit. A unique and in sonic mays exccllcnt work. 11. E. C. ~l G l l l : R -~C l l O O I A QUALI'WI~IV~S AXALSSIS. By F. A.
Mcerciidonk, &A. Pp. riii+40. London : J. 31. Dent k Sons, Ltd., 1938. Is. Gd. 111 this concise laboriitory handbook thc author endeavours to nvoid all tests tliut will not always " work " under given conditions. An nttcmpt is also made to classify anions into threc groups. This simplified system should provc -cry useful for bcginncrs provided its limitntions arc duly recognized.
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