n CONTENTS. [Vol. 37 



Page. 



Determination of peanut oU in mixtures with olive oil, Biazzo and Vigdorcik. . 312 



Determination of colza oil in mixtures with olive oU, Biazzo and Vigdorcik. . . 312 



Determination of theobromin and caffein in cocoa and chocolate, Savini 312 



Detection of lime used as a neutralizer in dairy products, Wichmann 313 



The determination of sugar in gummy substances, Sa\-ini 313 



Quantitative determination of minute amounta of sugar by a-naphthol, Blake . . 313 



Utilization of cull citrus fruits in Florida, McDermott 313 



Action of ultraWolet rays on alcoholic fermentation, de Fazi 314 



Value of household remedies for vinegar disease in wine, Baragiloa and Braun. 314 



METEOROLOGY. 



Climatological data for the United States by sectionB 314 



Meteorological observations, Stevens 314 



Meteorological summary, Brown 314 



Relative humidities and vapor pressures over the United States, Day 314 



Average rainfall. May and June 315 



A safe method proposed for estimating minimum rainfall, Wells 315 



Effect of a late spring upon crop yields 316 



Safe dates for planting com 316 



Weather and cotton 316 



Safe date for planting potatoes 317 



SOIL — FERTILIZERS. 



Special crop soils [of New York], Fippin 317 



Peat moors in the coast regions of southern German East Africa, Janensch 317 



Recent studies on nitrification in soils, Sarachaga 318 



Fixation of ammonia in s<^)ils, McBcth 318 



Relation of soil nitrogen to nutrition of citrus plant*, McBeth 318 



Tests on the disinfection of soil, Mi^ge 319 



Chemical studies of legumes as green manures in Hawaii, Thompson 320 



Tests of manure, fertilizer, and crimson clover for vegetable crops, \Miite 320 



Experiments with nitrogenous fertilizers, lakushkin (Jakouchkine) 321 



Preparation of dried blood in the army slaughterhouses, Ranc 321 



The atmospheric nitrogen industry, Tobian.«ky D'Altoff 321 



The displacement of potash by ammonium nitrate, Zavaritskil (Zavaritzki) 321 



Potash fertilizer salts, van Stolk 322 



Potash: Economic sources in South Australia, Winterbottom 322 



Pumpino; potash from Nebraska lakes, Crawford 322 



Artificial zeolite as a source of potash for plants, Smimov 322 



Remarks and technical tests on the preparation of superphosphates, Aita 322 



The composition of some Thomas meals, van Raaij 323 



Assimilation of phosphoric acid from phosphorites by cereals, fakushkin 323 



Assimilation of phosphoric acid of phosphorite by plants, Chirikov (Tchirikov) . . 323 



The value of diphosphate, lakushkin (Jakouchkine) 323 



Solubility of difficultly soluble phosphates in citric acid, Aita 323 



Influence of calcium carbonate on solution of iron phosphate, Semushkin 324 



Analyses of inspection samples of fertilizers, 1915-16, Willard and Wiley 324 



Analyses of inspection samples of fertilizers, fall 1916, Willard and Wiley 324 



Fertilizers sold in Wisconsin, Strowd 224 



AGRICULTURAL BOTANY. 



Method of ascertaining mechanism of growth of dormant buds, Loeb 324 



Influence of the leaf upon root formation and geotropic curvature, Loeb 325 



The spontaneous negative geotropism of roots, Mameli and Cattaneo 325 



Behavior of certain gels useful as to action of plants, MacDougal and Spoehr. . 325 



Effect of continuously supplying water to plants by capillarity, Daniel 325 



A study of permeability by the method of tissue tension, Brooks 326 



Similarity in the effects of potassium cyanid and of ether, Osterhout 326 



The mode of action of the oxidases, Bunzel 326 



Relative oxidase activity of different organs of the same plant, Bunzel 326 



A comparative study of winter and sumnier leaves of yanous herbs, Stober. . . 327 



Local and temporary autumnal symbiosis, Montemartini 327 



The penetration of foreign substances introduced into trees, Rankin 327 



The injurious effects of tarvia fumes on v^etation, Chivera 327 



