n CONTENTS. 



Page. 



Influence of peptones on estimation of sugars by Fehling's solution, Bernardi. . (jl3 



Determination of traces of iron in sugar refinery products, Eastick et al 613 



Precipitate by metcuric acetate from molasses; adenin, Stoltzenberg 614 



The grinding of spruce for mechanical pulp. Thickens 614 



The occurrence of lactic acid in sisal, McGeorge 615 



METE OEOtOGT— WATE R . 



Meteorology for the farm and weather forecasting, Granderye 615 



Evaporation conditions at Skokie Marsh, Sherff 615 



Evaporation from water and soil surfaces in the Livermore Valley, Espy 615 



Suggestions for frost protection, Kellerman 616 



Weather record, 1912, Burke 616 



Report of the consulting meteorologist, Voorhees 616 



Meteorological data, January 1, 1910, to December 31, 1912 616 



Water supply of District of Columbia and power at Great Falls, Langfitt et al. . 616 



Water power of [rivers of the northern half of] Indiana,, Tucker 616 



Chemical and biological survey of the waters of Illinois 617 



The mineral content of Illinois waters, Bartow et al 617 



The utilization of sewage, Soper 617 



Sewage purification at Atlanta, Ga 617 



SOILS — FEKTILIZERS. 



Soil temperature and some important factors influencing it, Bouyoucos 618 



Soil moisture, Willard and Humbert 620 



The fixation of nitrogen in Colorado soils, Headden 621 



A study of nitrification in certain types of Virginia soil, Fred 621 



The use of forest humus in agriculture, Ehrenberg and Bahr 622 



Report of the physiologist, Loew 622 



Report of the chemist, Gile 623 



Relation of calcareous soils to pineapple chlorosis, Gile 623 



Soil acidity and liming, ^Vhitson and Weir 623 



The Illinois system of permanent fertility, Hopkins 623 



Shall we use "complete" commercial fertilizers in the corn belt? Hopkins.. ti23 



Effect of fertilizers on the soluble plant food and crop yield, EUett et al C23 



The changes in phosphorus in fermenting mixtures, Tottingham and Hoffmann . 624 



Formation of nitrate from peat nitrogen, fakushkin 624 



Solvent action of ammonium salts on phosphorite in sand cultures, Chirikov. . 624 



Superphosphates of different kinds in sand cultures, Kalinkin and fakushkin. . 624 



The assimilation of metaphosphate and pyrophosphate by plants, Arnoldi 624 



Absorption of potash from zeolites by plants, Chirikov 625 



Vegetation experiments with potash minerals in 1911, KaUnkin 625 



Vegetation experiments with potash minerals in 1912, Chirikov 625 



On the action of sodium salts in vegetation experiments, fakushkin 625 



Gunpowder as fertilizer 625 



Fresh sludge and decomposed sludge, Bach and Frank 625 



The fertilizing value of pond mud, Kossowitsch 625 



Commercial fertilizers, Jones, jr. , et al 626 



Analyses of commercial fertilizers, Hartwell et al 626 



The Missouri fertilizer law, Mumford 626 



AGRICULTURAL BOTANT. 



Twenty-five years of botany in Iowa, Macbride 626 



Native dye plants and tan plants of Iowa, with notes on other species, Kellogg. 626 



Botanical features of the Algerian Sahara, Cannon 626 



The coefficient of humidity: A new method of expressing soil moisture. Crump. 626 



Osmotic pressure and related forces as environmental factors, Livingston 627 



Some quantitative researches on the permeability of plant cells, Osterhout. . . . 627 



The organization of the cell with respect to permeability, Osterhout 628 



Structure and function of the skin of the potato tuber, Stoward 628 



The study of nitrogen nutrition in plants, Pouget and Chouchak 628 



Arsenic and manganese in leaves at different ages, Jadin and Astruc 628 



Replacement of zinc by copper in the culture of Aspergillus niger, Lepierre. . . 628 



The action of sulphuric acid on seeds, Bianchi 628 



