CHEMISTRY. 323 



On the reactions in the cold between phosphoric acid and ether in the pres- 

 ence of water, Berthelot and Andre (Ann. ('him. el Phy's., 7. ser., 10 (1897), June. pp. 

 210-217). — The results indicate that the difference in solubility of phosphoric acid iu 

 ether arid in water may be generally utilized in the analytical study of this substance. 



Facts relating to the history of metaphosphoric acid, Berthelot and Andre 

 (Ann. (him. et Phys., 7. ser., 10(1897). June, pp. 204-210).— rSee also Compt. Rend. Acad. 

 Sci. Paris, 124 (1897), p. 265 (E. S. R., 9, p. 23). 



On the simple and complex pyrophosphates of magnesium, Berthelot and 

 Andre (Ann. ('him. et Phys., 7. ser., 10 (1S97), June,pp. 100-197). — A brief report of the 

 results of. a study of the composition of the precipitate obtained from a solution of 

 pure sodium pyrophosphate by the addition of pure magnesium chlorid in the pres- 

 ence of anionia, being a continuation of the investigations noted above. 



Transformation of pyrophosphoric acid, Berthelot and Andre (Ann. Chim. 

 et Phys., 7. ser., 10 (1897), June,pp. 197-204).— Kre also Compt. Rend. Acad. Sci. Paris, 

 123 (1896), p. 776 (E. 8. R., 9, p. 23). 



The determination of meta and pyrophosphoric acid in dried superphos- 

 phates, Pirou and vox Mezence (Ann. Chim. Analyt. et Appl.,-2 (1897), p. 4). 



The quantitative separation of wheat proteids, G. L. Teller (Arkansas Sta. 

 Rpt. 1896, pp. 81-104).— A reprint from Bulletin 42 of the station (E. S. R., 8, p. 854). 



Spectroscopic determinations of metals in the artesian water of Castel- 

 Pranco and of cesium in the ashes of cultivated plants, A. Casali (Staz. Sper. 

 Agr.Ital.,S0(1897), No. 3, pp. 211-219). — Cesium, rubidium, and lithium were detected 

 in the artesian water. Of the ashes of 20 plants examined all except 2 gave a 

 reaction fur cesium. 



Chemical constitution of the vegetable alkaloids, A. Pictet (Constitution 

 tihimiqne des alcaloides ve'ge'taux. 2ded. Pari*: Masson ^ Co., pp. £21). 



A. pipette for the rapid and exact measurement of liquids, M. Knudsen 

 (Chem. Ztg., 21 (1897), No. 64, p. 637, fig. 1).— A glass pipette id" ordinary form is pro- 

 vided at the mark with a stopcock which has both transverse and Longitudinal 

 openings. With this cock in proper position the pipette is filled by suction to some 

 point above the cock. A turn of the cock closes the pipette and secures the liquid. 

 Afurther turn of the cock admits air through the longitudinal opening to the space 

 below the cock, and the liquid in that space is discharged, that above the cock 

 remaining undisturbed. — j. t. ANDERSON. 



A new laboratory apparatus, II. WlTZKL (Chem. Zttj., 21 (1S97), No. 53, p. 536, 

 fij.l). — A modified Kipp's gas generator is provided with a tlask for washing or 

 drying the gas before it is emitted. A device for preventing the spurting out of the 

 Wash liquid is attached. — j.t. ANDERSON. 



A new method for preparing chemically-pure hydrogen sulphid, J. R. Michler 

 (Chem. Ztg., 21 (1897), No. 67, p. 659, Jig. 1).— The materials used are hydrochloric 

 acid and calcium sulphohydrate. The apparatus is a modified Kipp's apparatus with 

 a fountain for the acid and a wash flask to purify the gas. — j.t. andersox. 



Agricultural chemical work, 1896, V. Stein (Tidsskr. Landokon., 15 (1896), 

 pp. 717-737). — A brief report of analytical work performed for the Royal Danish 

 Agricultural Society during 1896. In all, 6,915 samples were analyzed or examined, 

 viz, fodders, 425 samples; fertilizers, 1,634 samples; dairy products, 4,795 samples 

 (milk, 2,434; butter, 2,301; and cheese, 60); miscellaneous analyses, 61. 



Treatise on the analysis of agricultural substances, L. Grandeau (Traite d" an- 

 alyse des matures agricoles. Paris: Berger-Levrault $■ Cie., 1897, Vol. I. pp. 560, figs. 54; 

 Vol. II, pp. 614, figs. 117). — This is the third edition (revised and enlarged) of this 

 well-known work. The first volume deals witli methods of analysis in general, 

 analysis of soils and fertilizers, and fertilizer legislation; the second with air, water, 

 analysis of plants, fodders, animal products, manure, wool, milk, fats, and fermented 

 liquors. 



For a review of this edition by P. P. Deherain see Ann. Agron., 23 (1897), No. 5, 

 p. 229. 



