n CONTENTS. [Vol. 36 



Page. 



A simple mercury sealed ether still, Smith and Morgan 504 



An electrically heated vacuum desiccator, Robertson and Schmidt 504 



Analysis by machinery, Sinkiason 504 



A method for the determination of nitric nitrogen, Scales 504 



The efficiency of the aeration method for distilling ammonia, Kober 504 



The separation of lithium from the other alkali metals, Palkin 505 



Method of extraction as affecting phosphoric acid in soils, Hale and Hartley. . 505 



Investigation of methods for determination of the soil reaction, Christensen. . 505 



The determination of volatile fatty acids, Voitkevich (Wojtkiewicz) 506 



Estimation of sugar in meat products, particularly extracts. Smith 506 



The determination and distribution of moisture in bread, Wessling 506 



Microscopical examination of chocolates and cocoas, Collin and Gobert 506 



The determination of gum in gum sirups. Luce 507 



New method for determination of vanillin in vanilla extract, Dox and Plaisance . 507 



The use of amyl alcohol in Gerber's method, Orla-Jensen 507 



The biological method for judging the freshness of milk, Kalantarov 507 



A polariscopic determination of sugar in "condensed milk," Brooks 508 



A study of proteins in urine and their estimation, Marshall et al 508 



An aeration method for alcohol in fermentation mixtures, Dox and Lamb 508 



Distillation of cane sugar at the distillery of Oisemont (Somme), Saillard ...... 508 



Home and farm canning, Cruess 509 



The use of pure yeast in the preparation of fruit wines, Korolev 509 



The Burma myrobalans or "panga" fruits as a tanning material, Puran Singh.. 509 



The conservation of pork, Kallert and Standfuss 509 



Conservation of fish by freezing. Plank, Ehrenbaum, and Renter ; 509 



A method for determining the strength of paper when wet. Reed 509 



METEOROLOGY. 



The weather map: An introduction to modem meteorology, Shaw 509 



Highest and lowest temperatures of 1916 509 



Frosts of 1916 510 



Report of the meteorological service [of Canada], Stupart 510 



The meteorological office of Argentina, Davis 510 



The climate of France, Bigourdan 510 



The oscillation of climate m southeast Russia, Tol'skii (Tolsky) 510 



Influence of the weather on the use by plants of fertilizers, Christensen 510 



SOILS — FERTILIZERS . 



Measurements of soil fertility, Jordan 510 



Concerning tillage, Burdick 511 



Soil survey of Clay County, Alabama, Taylor et al 511 



Soil survey of Clinton County, New York, Maxon and Cone 511 



The soils of Cuba, Crawley 511 



Microbiological investigation in connection with crop yields, Voitkevich 511 



Organic matter of soil. — I, Himaus, humus carbon, and nitrogen, Gortner .... 512 



Investigations on an experimental cultivated soil. Diem 513 



Influence of pine resin and tannin on the soil, Koch and Oelsner 513 



Influence of moistvu-e on the nitrogen changes in soils, Traaen 513 



On the nature of ammonification and nitrification, Miyake 513 



Gain in nitrogen from growth of legumes on acid soils, Fred and Graul 514 



The physiologically acid and alkaline salts and soil sickness, Aberson 514 



Vertical distribution of phosphorus in surface soil of prairies, Alway and Rest. 514 



Mobilization of soil phosphoric acid under influence of bacteria, IV, Severin . . 515 



The influence of salts on the bacterial activities of the soil. Greaves 515 



Muck humus as a fertilizer and carrier of soil bacteria, Manns and Goheen .... 516 



Experiments on " humogen " (bacterized peat), Voelcker 517 



Nodule bacteria (Bacterium radicicola) in soils, Kalantarov (Kalantarow) 517 



Are spore-forming bacteria of significance in soil? Conn 517 



A possible function of Actinomycetes in soil, Conn .... 518 



The relation of protozoa to certain groups of soil bacteria. Hills 518 



Sterilization of the soil, Cunliffe 518 



Green manuring experiments, Voelcker 518 



Availability of potash as affected by lime or gypsiun, Briggs and Breazeale 519 



Acidity of soils and lime requirements, Voelcker 519 



