n CONTENTS. [Vol. 37 



Page. 



Quantitative microscopy, Wallis 205 



Aji improved method of determining solubility, Hendrixaon 205 



Preparation of sulphurous acid, Hart 205 



An improved nephelometer-colorimeter, Kober 205 



The iodometric determination of sulphur dioxid and the sulphites, Ferguson . . 205 



Estimation of butyric acid in biological products, I, Phelps and Palmer 206 



Thiobarbituric acid as a qualitative reagent for ketchexose, Plaisance 206 



Nitrogen in amino form as determined by formol titration, Swanson and Tague. 206 



The amino-acid nitrogen content of the blood of various species, Bock 206 



A rapid method for determining calcium in blood and milk, Lyman 207 



[Note on the Duclaux method] 207 



The detection of small amounts of oxalic acid in wine, Besson 207 



Researches on the ultrafiltration of milk, Borrino 207 



Method for determining diastatic acti\-itv of germinated grain, Nowak 208 



The soluble carbohydrate content of fee<ling stuffs, van Kampen 208 



Cane juice clarification, Ilines 208 



Normal fermentation of sauerkraut, Round 208 



METEOROLOGY. 



Relation of weather to crops and varieties adapted to Arizona conditions 209 



Native vegetation and climate of Colorado in relation to agriculture, Robbins. . 209 



Weather conditions, 1911-1916 210 



SOILS — FERTILIZERS . 



Soil survey of New Castle County, Delaware, Morrison et al 211 



Analyses of soils of Habersham County, Worsham, jr., et al 211 



Bremer County soils. Stevenson, Brown, and Howe 211 



Soil survey of Richards<3n County, Nebraska, Meyer et al 211 



Soil Survey of Hamilton County, Ohio, Gofxlman et al 212 



Agricultural possibilities of ( )hio peat soil.'*, Dachnowski 212 



Study of the vine growing soils of Vevey [Switzerland], Anken 212 



The soils of Southern Rh(Kl(\sia and their origin, Maufe 212 



The soil mulch, Call and Scwell 212 



Lime-requirement methfxls and the soil's content of bases, SchoUonberger. . . . 212 



Effect of some acids and alkalis on soil bacteria in the .'^oil fnilution, Cruzit 213 



Investigations in soil protozoa and soil sterilization, Kopeloff and Coleman 213 



The ecological significance of soil aeration. Cannon and Free 213 



Reclaiming the waste, Graham 214 



Summaries of soil fertility investigations, Wiancko and Jonee 214 



Why Illinois produces only half a crop, Hopkins 214 



Live stock and the maintenance of organic matter in the soil, Pippin 215 



The manual of manures, Vendelmans 215 



Fertilizers and their supply in war time, Voelcker 215 



Artificial manures for crops in western India, Mann and Paranjpe 215 



[Fertilizer experiments], Licchti 210 



Standardization of humus us(»d for fertilizer, HofT 216 



The organic nitrogen compounds of soils and fertilizers, Lathrop 216 



Sources of nitrogen compounds in the United States, Gilbert 217 



The nitrate industry, Cueva^s 217 



When are summer crops to be fertilized with lime nitrogen? Wagner 217 



Fertilizer experiments, Alway 217 



Phosphate rock, Stone 217 



Potash in a^rriculture, Aston 218 



The volatilization of potash from cement materials, Anderson and Nestell 218 



Growing crojps without potash in 1916, Woods 218 



Lime in agriculture, Felder 218 



Forms of agricultural lime and their application, Feamow 218 



The relation of lime to agriculture. Brought on 218 



The question of lime fertilization, Licchti and Tnmninger 219 



Decompovsition and utilization of limeetone in soil, Ames and Schollenberger. . 219 



The fertilizing value of wa.stes from the hemp industry, Draghetti 219 



[Fertilizers, season 1915-16|, Ross 219 



Analyses of commercial fertilizers, ground bone, and lime, Cathcart et al 219 



Analyses of fertilizers and cottonseed mnal. Kilgore et al 220 



List of fertilizer and lime manufacturers and importers 220 



