II CONTENTS. [Vol. 37 



Page. 



A simple gaa generator, Fernandez 110 



A new direct reading refractometer with uniformly divided scale, Moffit 110 



Further studies on the Ives tint photometer, Kress and McNaughton 110 



Determination of carbon dioxid in carbonates by diminished pressure, Zinn. . . 110 



The Penfield test for carbon, Mixter and Haigh 110 



The volumetric determination of tin, Hallett ] 10 



On the determination of potassium as perchlorate, Baxter and Kobayashi 110 



The use of methylene blue in chemical analj'sis, Monnier 11 1 



The phenoldisulphonic acid method for nitrates in soils, Davis Ill 



The detection and estimation of small amounts of methyl alcohol, Elvove Ill 



Cellulose, Cross, Bevan, and Beadle ' 112 



A quantitative method for the determination of arginin in protein, Jansen 112 



Red peppers, Boyles 112 



Vinegar: Its manufacture and examination, Mitchell 112 



The volatile reducing substance in cider vinegar, Balcom 112 



The analysis of Peruvian bark, Commelin 113 



Determination of the various forms of nitrogen in forage plants, Passerini 113 



The estimation of hydrocyanic acid in Sorghum rulgare, willaman 113 



Relation of the fat in milk to the solids-not-fat, Brown and Ekroth 113 



The detection of preservatives and coloring matter in milk, Kolthoff 113 



A new method for the analysis of rancid fats and oils, Issc^Lio 114 



[Report of the analj'^is of various eampla«j 114 



Fruit drjing, Allen 114 



Sulphitation in white sugar manufacture. Maxwell 114 



A study of commercial beech woofl creosote, Smith and Acrec 114 



A method of producing crxide wood creosote from hardwood tar, Judd and Acree . 114 



METEOROLOGY. 



Relation of weather to amount of cotton ginned during certain periods, Kinccr. 114 



\ronthly Weather Review 115 



f Uimatological data for the United States by sections 116 



Meteorological records 116 



Meteorological observations at Massachusetts Station, Ostrander and Saunders. 116 



Free-air data at Drexel aerological station: Januarj'-March, 1916 116 



Ammonia in dew 116 



SOILS — FEnriLIZERS. 



Water content of soil and composition of soil solution, McCool and Millar 116 



Water-retaiuLng capacity of soil and hygroscopic coethcicnt, Alway and McDole . 117 



Investigations on the acidity of acid mineral soils, Osugi and Uetsuki 118 



The sulphur content of some typical Kansaa soils, Swanson and Miller 119 



Studies in sulfofication, Brown and Johnson 119 



Nitrous nitrogon in irrigated soilsj Greaves, Stewart, and Hirst 120 



Influence of humus-forming materials on bacterial activities. Brown and Allison . 120 



Organic matter of soil. — IV, Data on humus-phosphoric acid, Gortnerand Shaw. 121 



Soil survey of Buchanan County, Missouri, Tillman and Deardorff 122 



Soil surv'ey of Polk Coimty, Nebraska, Snyder and Kokjer 122 



Soil survey of the Camden area, New Jersey, Patrick et al 123 



Soil survey of Blair County, Pennsylvania, Veatch et al 123 



Summary' of results of cane-culture testa in Java, I-III, Geert^ 123 



The solubility of mineral phosphates in citric acid, II, Robertson 124 



Liming and lime requirement of soil, Ames and Schollenberger 124 



Effect of manganese on ammonification and nitrification. Brown and Minges. . 126 



Fertilizer analyses, McDonnell et al .« 127 



Commercial fertilizers, 1916, Hite and Kunst 127 



AORICULTUnAL BOTANY. 



The morphology' of the monocotyledonous embn,'o, Worsdell 127 



Further experiments on correlation of growth in Bryophyllum calycinum, Loeb. 127 



Cambial activity in certain horticultural plants, Knudson 127 



Tho epidermal cells of roots, Roberts 128 



New determinations of permeability, Brooks 128 



Studies on exosmosis. Brooks 128 



Role of osmotic pressure of soil solution in culture of wheat, Tulalkov 128 



