n CONTENTS. [Vol. :?5 



Page. 



The protein content of muscle, Janney 614 



The ninhydrin reaction, Harding and Wameford 614 



The ninhydrin reaction with amins and amids. Harding and MacLean 615 



The determination of phytosterol in animal fats, Kiihn et al 615 



The determination of stearins by means of digitonin, Pfeffer 615 



The physiology of souring of pure and watered milk, Reiss 616 



Gravimetric determination of reducing sugars, Meade and Harris - - 616 



Determination of the gelatinizing temperature of starches, Francis and Smith. 616 



Method for free formaldehyde and hexamethylenamin, Collins and Hanzlik.. 616 



[Report of the fermentation section], Mxiller-Thurgau and Osterwalder 616 



[Report of the chemical section], Baragiola, Godet, and Schuppli 617 



METEOROLOGY. 



Weather as a business risk in farming. Reed and Tolley 617 



Critical period of growth 617 



Weather and the yield of com - 618 



The four greatest com States 618 



Rainfall and temperature and com yield 618 



Weather and vdeld of j)otatoes 618 



Monthly Weather Review 618 



The so-called change in European climate during historic times, Hildebrandsson 619 



Climatological data for the United States by sections _ 619 



Meteorological observations at Massachusetts Station, Ostrander and Sims 619 



Tropical rains: Their duration, frequency, and intensity, Fassig 619 



Fog as a source of water supply. Reed 619 



The climate of Roumania in relation to dry farming, Georgesco 620 



Influence of weather on nitrogen acids in rainfall in Australia, Masson et al 620 



Discussion on smoke abatement and air pollution 620 



SOILS — FERTILIZERS. 



Soil temperature, Bouyoucos 620 



Interrelationships between certain soluble salts and soil colloids, Sharp 622 



How much plant food is removed by crops and drainage water? von P'eilitzen. . 623 

 Calcium, magnesium, potassium, and sodium in drainage water, Lyon and Biz- 



zell 623 



The loss of sulphur in drainage water, Lyon and Bizzell 623 



The cause of the fixation of phosphoric acid by the soil, Pratolongo 624 



The oxidizing power of soils, Gerretsen 624 



The principles of crop production, Russell 624 



Soil survey of Walker County, Alabama, Veatch, O'Neal, jr., and Stroud 624 



Soil survey of Pennington County, Minnesota, Smith, Kirk, and Ward 625 



The chemical composition of some Minnesota peat soils, Hungerford 625 



The soils of Mississippi, Logan 625 



Soil survey of Dunklin County, Mssouri, Sweet et al 625 



Soil survey of Roger Mills County, Oklahoma, Kerr, Agee, and Hall 625 



Soil survey of Lancaster County, Pennsylvania, Gil ert et al 626 



Soil survey of Brazos County, Texas, Veatch and Waldrop 626 



Soil i lacteriology, Hutchinson 626 



The humification of the constituents of plant organisms, Trusov (Trousetlj 627 



Humus acids in the light of the results of recent investigations. Gully 628 



Report on experiments with i acterized peat or humogen, Chittenden 628 



The effects of radio-active ores and residues on plant life, Sutton 628 



Experiments with green manures and green manuring at Flahult, von Feilitzen . 628 



Displacement '<y water of nitrogenous and mineral material in leaves, Andre. . 629 



Report on ten years' experiments with sewage fertilizers, Kuhnert 629 



Solu' liUty of plant-food elements as modified i <y fertilizers, Jensen 629 



New experiments on the action of lime nitrogen, Stutzer and Haupt 630 



Accumulated fertility in grass land from phosphatic manuring, II, Somer\'ille. . 630 



The action of potash fertilization on the plants and soil, von Seelhorst 630 



The hygroscopicity of various potassium fertihzer salts, von Feilitzen 631 



Tests of availability of different grades of ground Umestxme, Broughton et al. . . 631 



Tabulated analyses of commercial fertilizers, Frear 631 



[List of fertilizer and lime manufacturers and importers and their products]. . 631 



The international movement of fertilizers 631 



