β Scribed by Robinson, P. L.
No coin nor oath required. For personal study only.
treatment of tlic benzcnc c1criv:ttivcs. For instnncc, no niention is mndc of iiny mcthod of distinguishing between tlic disiibstitiitcd bcnzcncs, whilc Tliiclc's t.heory of tlic struct,iirc of bcnzenc is oniittcd on tlic groitnds tlint it is bcyond t,lic scopc of tlic book, which ncvertlielcss introduces the .elcmcntitry t h o r y of the diffcrcnt forms of vitlency liiikagcs. It nlso is slight,ly more ndrnnccd tlian most orgiinic tcstbooks, through the introduction of chaptcrs 011 the tcrpcncs, licterocyclic coinpoiinds, nlknloids, and proteins. It is wcll written in a rnt,lier condensed stylc nnd nmply illustrated wiM formulio nnd tlingrnnls. The gcncrsl pro-ESSAI suit IA CIIIJIIE Co~ri:\itk~ : LES Coitrs S I J I P I ~. I3y Dr. 1. N. Longinescu. 1'1). vi + 9s. l'nris : Lcs Presses Unircrsitnircs dc Frnncc, 1033. Thc niitlior of this siiinll treatise is of tlic opiniou tllilt too litt,le attention is paid in tlic st,udy of inorginic clicmistry to t lic rclntions among t he inenibcrs of t.hc groups of the periodic system, and iittempts to iniikc good the deficiency. In niost test-l~ooks tlicrc nrc bricf introductory sections deiiliiig \vitli such rrinttcrs before the detailed study of thc individual clcincnts in eitch group is taken up, nnd tlic Iirescnt voliiinc givcs \vh:rt may Lc rcgrirdcd 11s csparisiotis of such scctious. 'l'licre is 110 doubt t.liat such ii treittniciit offers iiiaiiy iidviintiigcs existirig works, but it inny iilso I J ~ siiid that 110 reitl kiiowlcdgc of iiiorgiinic clicmistry can be obtained by tlJs method nlonc. In eitcli section tlic p1iysic:tl propcrtics, allotropic form, iind cliciiiicnl propcrtjcs nrc vcrp bricfiy considcrcd. Tlic :iutlior proniiscs n second volume dealing with binary coinpounds in which t.hc s a w mctliod' of t~rcittment is to be iidoptcd. Tlic two principal sources uscd by tlic itut,lior arc Dittc's Etiitle gkidrarale Jes Sels, 1906, illid Ephrniiii's . ~l ~i ~r p i i i ~c / i ~ Ckemie, 1929, both of which arc siniiliirly plnnncd. Prof. Longiuescu's essay is oiic which citn be rciid with profit by stiidciits trtkiug coiirscs in inorgitnic clicmistry.
π SIMILAR VOLUMES
not mentioned by Posncr, although lic dcscribcs the prcpnrnbion of snlicylic ncid nnd its homologucs. The chnptcr on sulpliur compo~inds nppenrs wcnlr in its description of licterocylic sdpliur-contnining compounds sonic of which linm nssuincd considernblc iinportnnce iis rubber vulcanisntion accclc