Chemistry and Physics. 147 



ignited, on which the name graphitite was based, is explained by 

 the fact that the crystals of " graphitite " are smaller and more 

 compact and hence freer from cleavage cracks into which the acid 

 could penetrate. The so-called graphititic acid has been obtained 

 in crystals having the outlines of the original graphitite and with 

 the same optical characters as graphitic acid. Moreover graphitic 

 acid has also been prepared from graphitoid. There is no differ- 

 ence between the readiness with which graphite and graphitite 

 burn, the rate of burning depending on the size, on the scales and 

 on the purity of the material. — Zeitschr. Kryst. Min., xxviii, 291- 

 304; J. C/iem. Soc, lxxii, ii, 447, October, 1897. g. f. b. 



6. Manuel (V Analyse Chimique appliquee a VExamen des 

 Produits Industriels et Commerciaux / par Emile Fleurent, Doc- 

 teur des Sciences, Professeur remplacant du Cours de Chimie Indus- 

 trielle au Conservatoire des Arts et Metiers. 8vo, pp. iv, 582. 

 Paris, 1898 (G. Carre et C. Naud. 12 francs). — -As he says in 

 his preface, Dr. Fleurent does not offer this manual as a complete 

 treatise on chemical analysis. His object has been (1) to give the 

 best general methods of qualitative and quantitative mineral 

 analysis and of elementary organic analysis, free from unnecessary 

 detail, (2) to avoid long and tedious processes and to furnish only 

 one, or at most only two methods, giving rapidly the most accur- 

 ate results, and (3) to furnish the industrial chemist engaged in 

 commercial analysis with the necessary methods for rapidly exam- 

 ining fertilizers, vegetable and animal products, fermented bever- 

 ages and the like. After twenty pages of preliminary observa- 

 tions on the organization of the laboratory, on reagents and their 

 preparation, on taking samples and on the interpretation of the 

 analytical results, the book is divided into two parts, one treating 

 of mineral, the other of organic matter. The former alter giving 

 the principles of qualitative and quantitative analysis, considers 

 the analysis of alloys, mineral colors and fertilizers, and cements. 

 The latter takes up first organic analysis and then treats of soils, 

 fertilizers, vegetable and animal products, including starch, fat, 

 sugar, etc., and finally of fermented drinks. Short chapters are 

 also given on the examination of fibers and the testing of petro- 

 leum. The book appears to be carefully written, is well illus- 

 trated, and will without doubt be of excellent service to the 

 commercial chemist, for whom it was prepared. g. f. b. 



7. Organic Chemistry for the Laboratory ; by W. A. Noyes, 

 Ph.D., Professor of Chemistry in Rose Polytechnic Institute, 

 Terre Haute, Ind. 12mo, pp. xii, 25 7. Easton, 1897 (Chem- 

 ical Publishing Co. $1.50). — The publication of handbooks for 

 the organic laboratory in this country is a gratifying evidence of 

 the rapid development of the science of organic chemistry in 

 instruction. The book before us must be regarded as a most 

 valuable addition to existing manuals and is altogether worthy of 

 Dr. Noyes' high reputation. The style is succinct and clear, the 

 classification of subjects admirable, the methods described are the 

 best possible and the illustrations numerous. g. f. b. 



