i t hns been in the pist." d cliiiriictcristic ilit.rodllction by JIr. Cliristoplicr Stone iitlds considcmbly to t,hc reiitlnbility of tlic voliime, ~vhilc there is n good index, miirretl in n few tested instrinccs by wrong p g c rcfercnct~s. Altogether 31 book to be rccotii-~ncndcd 11s i i worthy iitltlition to rinp tcclinicnl Iibriiry or to any oue intrrcstcd in tlie wny I' t.lic aliecls gn round " whcrc n griiniophonc rrcortl is concerned. A. J. Grnsos I~USIIAJIESTALS OF CIIEJIICAI. TIIERJIOI)TSAJIICS. l'iirt 11. Tlic!rinotlyniiiilici~l Punctions niicl Their Applieiitions. Hy J. A. V. Hut Icr, 11.S~. Pp. i s 4-271. I,ondon : ~Incniilliiii ,k Co., This volume is conccrrictl with the t Iicrinoclyiiniiiiciii functions, energy, frcu energy, nncl (wt ropy, i i ~i c l thrir pnrtinl tlerivntivcs. Tlic rcwlrr is iissumctl to 1111ve n knowledge of the ciilcuht ion of niiixi~niini work nnd thc sirnplcr iippliciitions of t Iic first iiiid second Iiiws of t Iicriiiodyiirii~iics, siicli 11s is covcrctl in J'nrt I of the book. l'iirt 11 is, liowcvcr, rciisonrihly complete in itself witliout rrfrrcncc to the ciirlicr pirrt. The iiictliotls cniployctl in triviting tlic subject tire essentiiilly those of Uil)bs rind C:. 9 . Zmvis, the inct,hods of stiitisticiil iiiecliiinics being riirely iiscd. Tlic prcscntcition of t.lic subject is clciir iintl Iogicnl iind the trcritinciit is ciirrictl to the point of current progress, NO thiit tlic book slioiiltl be nseful, not oiily :IS ii testbook, but iilso iis ii review of progress tlriring rccent yeiirs. 103.k. 8s. Gd.