n CONTENTS. 



Page. 



Reaction of soil and measurements of hydrogen-ion concentration, Gillespie. . . 504 



Calculation of total salt content and specific gTa\ity in marine waters, True 504 



The Kjeldahl-Gunning- Arnold method for nitrogen, Pickel 504 



Note on Kjeldalil method for nitrogen determination, Blumenthal and Plaisance 504 



A colorimetric method for amino-acid a-nitrogen, Harding and MacLean 505 



Improvements in the method for analysis of proteins, Van Slyke 505 



A method for the estimation of the tryptophan content of proteins, Homer 505 



The estimation of fat, Rosenthal and Trowbridge 505 



Experimental and critical contributions to the examination of foods 506 



The determination of starch in raw potatoes. Ewers 506 



The determination of glycerin in wine, Wohack 506 



Note on the determination of milk fat, Wright 506 



Note on use of colloidal iron in the determination of lactose in milk. Hill 506 



Experimental data comparing tests for hydrogen peroxid in milk, Darlington. . 507 



The apparent effect of acetic acid upon the constants of butter fat, Bahlman. . 507 



Chemical technology and analysis of oils, fats, and waxes, Lewkowitsch 507 



Determination of creatin in muscle and other organs, Janney and Blatherwick. . 507 



Determination of chlorids in body fluids, McLean and Van Slyke 507 



A rapid method for determining calcium in urine and feces, Lyman 508 



A simple method for the determination of ammonia in urine, Bonuema 508 



The gravimetric determination of tannic acid in tanning materials, Gawalowski. 508 



The tannin content of Pacific coast conifers, Benson and Thompson 508 



The Davis spot test in the preliminary examination of creosotes, Cloukey 508 



Practical wliite sugar manufacture, Prinsen GeerUgs 508 



UtiUzation of American flax straw in paper and fiber-board industry', Merrill. . 509 



Yield of by-products from distillation of conifers, Benson and Damn 509 



Discoloration of maple in the kiln, Judd 509 



METEOROLOGY. 



The dollar and cents value of California meteorology, Carpenter 509 



The physician and the Weather Bureau, Carpenter 509 



Influence of moon on weather changes and atmospheric disturbances, Fischer. . 509 



Battles and rainfall, McAdie 509 



Instructions to river and rainfall observers, Henry 509 



Instructions for class "A" evaporation stations, Kadel 509 



On the measurement of dew, Eredia 510 



The specific density of snow, Wengler 510 



Swedish meteorological observations, 1912 and 1913 510 



Rainfall observ^ations, compiled by Diem 510 



The relation of rainfall to the water supply, Grohmann 510 



Observations on lightning strokes, Joseph 510 



SOILS — FERTILIZERS. 



Soil survey of Tattnall County, Greorgia, Taylor et al 510 



Soil survey of Clinton County, Indiana, Tharp, J*eacock, and Rose 510 



Soil survey of Clarke County, Mississippi, Goodman and Jones 511 ' 



Soil survey of Grundy County, Missouri, Sweet and WatMns 511 



Soil survey of Scotts Bluff County, Nebraska, Skinner and Beck 511 



Petrography of North Carolina soils and their fertilizer requirements, Plummer. 512 



Geology, hydrology, and mineralogy of the Province of San Luis, Gerth 512 



Report on soils of Sierra Leone, Scotland 512 



Agricultural value of silts transported in Alps and Pyrenees, Miintz and Lain6. 512 



Soil productiA-ity and agrogeological surveys, Ferrar 513 



The probable error of sampling in soil surv^eys, Robinson and Lloyd 513 



A soil sampler for soil bacteriologists, Noyes 513 



New methods in soil protozoology, Kopeloff , Lint, and Coleman 513 



The distribution of Cyanophyceje on and in different soils, Esmarch 513 



The effect of climate on soil formation, Leather 514 



Observations on heating of the surface soil in 1914, Munch 514 



Soil gases, Leather 514 



Soil gases, Applevard and Russell 514 



Soil ventilation, lloward 514 



Soil colloids, Ehrenberg 515 



The adsorptive power of peat moors, Rohland 515 



