giving ndeqiintc theorcticiil csplnnntions with ench metliod tlcscribcd. In general only one cs:iniplc of ench type of deterininntion is given i i ~i d the cs:iniplcs are more of tlic iicndcmic tliiin conu~icrciiil t ypc. It mny be conimenclcd to the notice of teaclicrs looking for n textbook with n distinctly prricticiil bins, I)ut is not really suitiiblc to t lie rcqriircinents of tcclinicol chemists or industrinl nnnlysis. 11. E. c. AIDS TO THE ASALTSIS OF FOOD ASIJ DI~CGS. Ijy C. G. Moor, X.A., nntl IY. I'iirtritlgc. 5th ctl., revised nntl partly rc-written by J. It. Xicliolls, B.Sc. PI). viii + 322. London : Biiillihc, Tiiidall S; Cos, 193.1. 5s.
During the 17 ycnrs since tlic prcvioiis edition of this book wns publislicd, srvcral Acts of I'iidinnient, Regulations, nnd Orders relating to foods linve conic into force, :ml tlic 13ritisli l'ltiirniacopaoia lins bcen revised. A s n rcsiilt of this iintl of the :id.iiliccs in annlyticnl methods, ninny pnrts of this hook have hnd to be re-written or t*stcntlctl. Xcw sections on such subjects as the recognition of iil)ii~)rltiiil milk, preserved nnd iiiiportetl eggs, etc., rind on soiiic of tlie starches hnve been ntltlcd. Prcscrviitivcs forin t he subject of ii new nilJliO~~ii~~~l, which inclutics nictliocls for their detection nnd tlctcrniinntion. Tests for the prohibitctl colouring miittcrs iirc also given. The section on poisonous metals hris Ijcen conipletely re-written ; inore recent iintl rclinble incthotls of deterniinntion (ire givcn in detail.
The notes of tlic British 1'harniiicol)atia hiive also been rc-written, :ind 1i:ivc bcen considerilbly cstendctl, microcrystiillinc tcsts for nll<iiloitl~ :ire iiidiciited, iind a monogr;iph on '* the nnnlysis of imknown drug8 hns becn includcd."
A list of the viirioiis Acts, Rcgulations, nntl Orders in forcc concerning foods is b' 'lvcn.