n CONTENTS. [Vol.37 



Page. 



An automatic suction attachment for an ordinary pipette, Schroeder .303 



Device for the automatic and intennittent washing of precipitates, Lathrop . . . 503 



An improved form of a fumeless digestion apparatus, McUargue 503 



An apparatus for the purification of mercurj', Paiten and Mains 50:> 



Recoveiy of molybdenum residues, Lenher and Schultz .504 



Determination of total nitrogen, Lagers .504 



Nitrate determinations in the presence of chlorids, Gericke 504 



Study of determination of potash chiefly the Lindo-Gladding method, Ilibbard . 504 



Action of solutions of ammonium sulphate on muscoWte, Gardiner and Shorey . . 505 



Influence of calcite on determination of organic carbon, Shorey and Fry 505 



New method for silicic acid (zeolitic) in soils, Gedroits 505 



A note on the phenolsulphonic acid method for nitrates in waters, Nichols 506 



Note on the determination of strontium and lithium in water, Averitt 50(3 



Improved chemical methods for differentiating bacteria, Clark and Lubs 506 



The colorimetric determination of hydrogen in concentration, Clark and Lubs. . 50G 



Improvements in the copper method for estimating amino acids, Kober 50»J 



A simplified inversion process for the determination of sucrose. Walker 506 



A method for the estimation of levulose in presence of glucose, Loewe 507 



The determination of fat in certain milk products, Francis and Morgan 507 



Determination of water soluble fatty acids in butter and other fats, Kauffman. . 508 



Correction required in applying Babcock formula to evaporated milk, Evenson . 508 



The analysis of desiccated milk. — Determination of moisture and fat, Porcher. . 508 



Index of refraction of olive oil in relation to acidity and rancidity, Cutolo. . . . 508 



The identification of emodin- bearing drugs, Hubbard 509 



The biochemistry of tobacco, I, Paris 509 



The drying of fruits and vegetables, MacDonald 50f» 



Influence of nitrogenous sut^tances on ■svines, Miilier-Thurgau and Osterwalder. 509 



Chemical control in cane sugar factories, Prinsen Geerligs 509 



[Report of the] bacteriological department, C)wen 509 



Chemical changes caused bv defecation of sorghum juice for sirup, Anderson. . 51 1 



Sugar-beet sirup, Townsend. and Gore 511 



American vegetable food oils, their sources and methods of production, Bailey. . 511 



Brazilian oilseeds, Bolton and ilewer 511 



The natural accelerator of Para rubber, Stevens 512 



METEOROLOGY. 



Hail in the United States, Henry 512 



Oliservations on possible influence of violent cannonading on rainfall, Sebert. . 512 



Lightning and forest fires in California, Palmer 512 



Bacteriological study of the air of Buenos Aires, Riganti 513 



Monthly Weather Review 513 



Meteorological, magnetic, and seismic observations at Havana, 1916, Gaugoiti. . 513 



Meteorology, Trivett 51 ;^ 



SOILS — FERTILIZER.'^. 



Edgar County soils, Hopkins, Mosier, Van Alstine, and Garrett 514 



Soil survey of Clinton County, Iowa, Hawker and Howe 514 



The soil resources of Maryland, McCall 514 



Soil survey of Schoharie (.'ounty, N. Y., Maxon and Fuller 514 



Geology of southern Ohio, Stout 514 



Survey of Fairfax and Alexandria Counties, Va., Carter, jr., and Yingling, jr. . 514 



Principal plantation soil types found on Island of Hawaii, Burgess 515 



Method of botanical soil investigations, Chafanov and Mushchenko 515 



Degradation of chernozems of western part of northern t 'aucasus, I Akovlev 51 6 



Soil flora studies. — I, General characteristics. II, Methods, Conn 5U> 



Soil flora studies. — III, Spore-forming bacteria in soil, ("onn 516 



Soil flora studies. — IV, Nonspore- forming bacteria in soil. Conn 51fi 



Soil flora studies.— V, Actinomycetes in soil, Conn 517 



Soil bacteria and streptothrices that develop on dextrose agar, Emerson 517 



Some effects of auximones on soil organisms. Mo<?kcridge 517 



The organic matter of the soil. — V, Nitrogen distrihnt ■ n. Morrow and Gortner. 517 



The nitric nitrogen content of the countrj' rock, Stewart and Petei-son 518 



The significance of nitrification as a fartor in soil fertility. (Jainey 519 



Soil constituents which, inhilnt the a^:tion of plant toxins. Tniog and Sykora. . 519 



