II CONTENTS. [Vol. 3C 



Page. 



The determination of citric acid in milk, Kunz 415 



The determination of gum. and pectin in filter residues, Van der Linden 415 



The sirup precipitate in white sugar manufacture, Coates and Slater 415 



The composition of sound and frozen lemons, Bailey and Wilson 416 



Production of sweet-orange oil and a new machine for peeling citrus fruits 416 



The effect of ciuing on the aromatic constituents of vanilla beans, Rabak 416 



Notes on the production of oil of citronella, de Jong 417 



The use of bark for paper specialties, Kress 417 



METEOROLOGY. 



The effect of climate and soil upon agriculture, Spafford 417 



The probable growing season. Reed 418 



Weather insurance, Reed 418 



Condensed meteorological reports, Georgeson 418 



Meteorological observations at Massachusetts Station, Ostrander and Sims 418 



Monthly Weather Review 419 



[Observations on aerology] 419 



Notes on least squares, the theory of statistics and correlation, Marvin 419 



SOILS — FERTILIZERS. 



Soil survey of the Ukiah area, California, Watson and Pendleton 420 



Soil survey of Washington County, Georgia, Winston, et al 420 



Soil survey of Wilkes County, Georgia, Long 420 



Soil survey of Coahoma County, Mississippi, Button et al 420 



Soil survey of Dickey County, North Dakota, Bushnell et al 421 



Loess soils of Nebraska. — V, Water-soluble constituents, Upson et al 421 



Factors affecting evaporation of moisture from soil, Harris and Robinson 421 



Keep our hillsides from washing, Whitson and Dunne wald 422 



Protozoa as affecting bacterial activities in the soil, Waksman 422 



Nitrification in semiarid soils, I, Kelley 422 



The nitric nitrogen content of the country rock, Stewart and Peterson 423 



Distribution of phosphorus in a vertical section of bluegrass soil, Peter 424 



Nature of the sulphur in moorland soils injiuious to plant growth, Thorner 424 



Field tests of fertilizer action on soil aldehydes, Skinner and Noll 424 



Soil fertility 425 



The use of fertilizers to increase crop production, Stookey 425 



Improvement of hill and peaty pastures 425 



The necessity for guano in national agricultiu'e 425 



Factors affecting absorption and distribution of ammonia applied to soils, Cook . 425 



Investigation and valuation of crude calcium cyanamid , Liechti and Truninger . 426 



Effect of water on decomposition of crude calcium cyanamid, Hager and Kern . . 426 



Calcium cyanamid, Malpeaux 427 



Phosphate fertilizers for Hawaiian soils and their availability, McGeorge 427 



Phosphate fertilizers, Sutherland 428 



The citric acid solubility of the phosphate in Thomas slag, Kroll 428 



The conservation of phosphate rock in the United States, Phalen 428 



The salt and alkali industry, Martin, Smith, and Milsom 428 



"Loog as;" or the ash of the alkali bush. Stead 429 



Chemical analysis of ash 429 



Relation of the use of lime to the improvement of the soil, Fippin 429 



Analyses of commercial fertilizers and home mixtures, Cathcart et al 429 



AGRICULTURAL BOTANY. 



A textbook of botany for colleges, Ganong 429 



Some recent researches in plant physiology, Atkins 429 



The principles of plant teratology, Worsdell 430 



Morpholep of the flowers of Zea viays, Weatherwax 430 



Xerophotic movements in leaves, Gates 430 



The daily movements of leguminous leaflets, Gates 430 



The wami-water treatment of seeds difiicult to germinate. Honing 430 



The physiology and technique of forcing growth in woody plants, la Marca 431 



Injury to vegetation resulting from climatic conditions. Stone 431 



Formation of parenchyma wood following winter injury to the cambium, Mix. . 431 



