II CONTENTS, [Vol. 36 



Page. 



Loss of phosphoric acid in fusion with ammonium fiuorid, Davis and Prescott. 613 



Estimation of calcium in ash of forage plants and animal carcasses, Kuzirian. . 613 



A new limestone tester, Hopkins 614 



The determination of humus by means of a simplified procedure, lakobsen 6l4 



The estimation of carbohydrates, V, Davis 614 



New contributions to the analysis of milk, Ackermann 6l4 



The composition of cottonseed meal and cotton seed, Fraps 615 



Conservation of fruit, fungi, truffles, and vegetables, Forlani 615 



METEOROLOGY. 



Report of the chief of the Weather Bureau, 1916 615 



Report of the meteorological station at Berkeley, California, for 1915, Reed. . . 616 



Rain and snow fall of Canada, 1903-1913, Stupart 617 



Temperatiue observations during the year 1914, Stephansen 617 



Temperature changes from terrestrial radiation and relation to gi'owth. Roster. 617 



SOILS — FERTILIZERS. 



Agricultural geology, Rastall 617 



On taking samples of soil for soil surveys, Russell 617 



[Soil studies], Morse 617 



Soil survey of Yell County, Arkansas, Deeter and Lounsbury 618 



Composition of Hawaiian soil particles, McGeorge 618 



Summary of Illinois soil investigations, Hopkins, Hosier, and Bauer 618 



Tazewell County soils, Hopkins, Hosier, Van Alstine, and Garrett 619 



The principal soil areas of Iowa, Stevenson 619 



Soil survey of Grenada County, Mississippi, Tharp and Hogan 619 



Soil survey of the Bitterroot Valley area, Montana, Eckmann, and Harrington. . 620 



Geology of Cincinnati and vicinity, Fenneman 620 



Soil survey of Dorchester County, South Carolina, Latimer et al 620 



Soils of Grayson, Lee, McLennan, Titus, and Tyler Counties [Texas], Fraps. . . 620 



Soil survey of Smith County, Texas, Schoenmann et al 621 



Soil survey of Franklin County, Washington, Van Duyne et al 621 



Calcium compounds in soils, Shorey, Fry, and Hazen 621 



Studies on the Ume requirements of certain soils. Wild 622 



The phenomenon of absorption in its relation to soils, Prescott 622 



Definition of soil fertility by means of analysis of plants, Sawin (Sawine) 622 



Processes in relation to numification of plant residues, Trusov (Troussoff ) 622 



Soil protozoa and their relation to bacterial flora, I, II, Sherman 622 



The disinfection of soil, Miege 623 



Experiments on the Wisconsin drift soil area, Stevenson and Brown 623 



A modified method of green manuring, Hutchinson 623 



Peat in 1915, Turp 624 



Some sources of potassium, Hirst and Carter 624 



Potash as a by-product from the blast furnace, Wysor 625 



Potash becomes a valuable cement mill by-product, Hewitt 625 



Availability of soil potash, and the preparation of sugar humus, Fraps 625 



Solubility of mineral phosphates, Aita 626 



The utilization of phosphates by agricultural crops, Truog 626 



Report on commercial fertilizers, 1916, Jenkins and Street 627 



Tabulated analyses of commercial fertilizers, Frear et al 628 



Commercial fertilizers in 1915-16, Fraps 628 



AGRICULTURAL BOTANY. 



Plants in health and disease, Weiss, Imms, and Robinson 628 



The raw materials of the plant kingdom, von Wiesner 628 



Physiological characters of plants, II, III, Ivanov 628 



The overlapping of the leaf sheath and its lack of value, Conner and Karper. . 628 



A contribution to the problem of homotyposis, Harris 628 



Inheritance in crosses between Nicotiana langsdorffii and N. alata, East 629 



Linkage in Primula sinensis, Altenburg 629 



Some correlations in sugar beets, Harris and Hogenson 629 



What is happening to the hawthorns? Standish 630 



Influence of composition and concentration of the nutrient solution, Ayres 630 



Comparison of nutritive solutions in sand and water cultures, Stol'gane 630 



