lend chnnibcr process, :itid there follows nil riccoititt of the ciitnlytic iriflucncc of wictcr vapour, cliiiin reactions, and pire homogeneous gns reactions. Tlic litcriiture upon catalysis in soliltions hiis ntbiiiiicd such unwicldy proportions tlint tlic iiiitlior niuy be coi~gratiil:ited 011 con-(lensing iiit,o less t.linti 170 p:igcs n inost acleqiintc survey of this section of liis subject.
Tlic scc.t,ioii on ciixyiiic cntnlysis also gives ii soruttl tlescriptioii of prcseiit-dny ktiowlcdgc, but it lins hccii noted that, tlic niitlior in cliscitssing fcrtncntntion ntid oxidation eiizyines appears to ltnvc orcrlookccl the work of Kluyvcr and liis school wliich, in effect, 1i:is succeeded in giving n clear working theory of coiii plcs 11iict~~i:iI fermentation.
!Bit hook, whicli is well iiidesctl, covers so cstciisivc a field that i t inust prove of riiluc to all interested iii tlic subject of cat:ilysis.
H . T.
~NTEI~DIEI>IA'J'I.: ~I l I . ~~l I S ' ~l t
Y. l3J' !t'. i\l. l~O\Vry> c. 1%,lc., M.A., I).%., P.II.S., itlit1 :. C. C'i~vcll, l3.1., I%.Sc.
-1'1). xvi + 876. I l o i i ( l o i i : Jlncitiillaii S: C'o., Ihl.,
1936. 12s. (id.
This voliitiic is ii complete test-book of cliciriistry for the Iiitcrii\ediittc :iiitl I liglwr School Certificntc 1Ssaiiiinittioils. It,s cotitent,s iirc rirrniigctl in six sepiirutc sectioiis tlcirliiig \vjtli Cciierd tblid TlicorcticiLI L!lie~iiistry, Typicnl ICleiiieiits, Trimsitioii Elenleiits, Aiinlysis, Physiciil Chctiiistry, atid Ypinciplcs of Orgnuit: Clietiiistry. A series of 190 cspcritnc~its is also incorpor:itctl i n the test, niitl includes 1)rcpirr:itivc cscrciscs in I)otlt inorganic irntl organic clicitiistry, % pliysic.o-cliciiiiccil espt!riiiiciits, nilti i~ coiirsc in griiviinctric ;inti ~olumetric uuiilysis. 'l'lic inclusioti of tahlcs for qiiitlitrrtivc irniilysis reiitlcrs tlir priicticirl coiirsc coitiplctc iii itself.