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S E \ V BOOKS.
followed by the beginner. Many of the experiments are suitable ior the purposes of lecture illustration. T h e experiments follow the ortlcr of the t e s t of the author‘s well-known ”Text-book of ( wganic Chemistr?. ’ that has also been lately made accessible to English readers by the same translator and publishers. T h e 1,aboratory Manual,” whether used as intended by its author as an appendix to his “Test-b,wli. or einplo8yecl 2 s a source of material to supplcrneiit the laboratory work in more specialized courses i n “Clrganic Z’reparations.“ \vi11 doubtless meet a want iii this translation, :E it has i n the original. s. ~ 1 - t . 1 ~ ~ 1 ”
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I-’:XPBRIME~-TS A R R A S G W E’OK STUIIRNTS I N GENEKAI.CHE>IISTRY. HY EDGAR I:. SMITHA N D HAKRT; 1’. KBI,I,ER. Fifth Editioii. Phila.: 1’. Rlakiston’s Son arid Co. 94 p p . , interleaved. Price, 60 cents.
’I’his is one of thc ~ e r yien. laboratury manuals for beginners i n chemistry \vhich attempt to i!lust rate the priiiciplcs as well as the descriptive sidc o i the suhjcct, aiitl tu proyitlc the basis for a really thorough antl serious study of the science i i i both of thesc directions. ’The ~ x l i i cof R set of lal.)oratory cscrciscs can be iuclgetl only b!, actiial use antl the fact that this book has reached its fifth, rm-isctl. edition slio\\-s that the authors have achieved ai1 uiiusuaI1y succcssful solutioii oi the probleiii. Teachers who arc not alrcaily iaiiiiliar \\:it11 the work should not fail t o examine it r ,I: s . SM ITI T . srrioiisl!., CORRECTIONS. I n t h e paper by Andrew A. Blair on t h e Bismutliate hIethod for t h e Determination of Manganese” : Page 798, lines 18 a n d 19, read : “ T h e proportion is 280 : 5 j o r I : 0.19643,” instead of “ 5 6 : 5 5 o r I : 0.98214.” I n the foot-note, read 279.5 : 5 j o r I : 0.1968. 111 the Alcohometric Tables by E. W. Morley : Page 1189, the sp. g r . of alcohol of 47 per cent. at 22’ should be 0.g18gz instead of 0.91992. Page 1190, t h e sp. gr. of alcohol of 82 per cent. a t 16’ should be 0.84199 instead of 0.84189. Page 1191,t h e sp. gr. of alcohol of 74 per cent. a t 22’ should be 0.8j641 instead of 0.8 562 I . Page I 193, line 3 of t e x t . read O.OOOIO instead of 0.0010. Copies of Professor Morley’s Alcohametric tables, printctl 011 heavy paper, may be obtained of the Librariaii or Editor at tei: wilts cadi. Stamps will be accepted.
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