n CONTENTS. [Vol. 41 



Pago. 



The proximate analysis of wood, Dore 14 



Nitrating of woodpulp cellulose, Wells and Edwardes 14 



Studies on canning, Bovie and Bronfenbrenner 14 



The bacteriology of canning 15 



Saving raisins by sulphuring, Bioletti and Way 15 



Potato drying, Kutishauser 15 



METEOEOLOGY. 



Introductory meterology, Humphreys et al 15 



Evaporation and area of evaporating surface, Gallenkamp 15 



Climate formula and reduced rainfall, KOppen 16 



Bioclimatic law in entomological research and farm practice, Hopkins 16 



A soil temperature survey of the United States and Canada 16 



The cUmate of Utah, West and Edlefsen 17 



[Weather reports for 1917], Georgeson et al 17 



Meteorological observations, Stevens 17 



Observations at Massachusetts Station, Ostrander and Chandler 17 



sores — FEETIUZEBS. 



Soil survey of Montgomery County, Iowa, O'Neal, jr., and Rhodes 17 



Soil survey of St. Martin Parish, La., Meyer and Hendrickson 18 



Soil survey of Mahoning County, Ohio, Beck and Gossard 18 



Sandy soils and how to farm them, Whitson and Ullsperger 18 



The " slick spots " of middle western Idaho, Peterson 18 



The value of legumes on Indiana soils, Wiancko et al 19 



Continuous wheat and rye with and without legume, Lipman and Blair__ 19 



H-ion concentrations in extracts of soils and plants, Kappeu and Zapfe — 19 



The value of ammonification test, Temple 19 



Ammonification of manure in soil, Conn and Bright 20 



Preservation of nitrogen In liquid manure, Vogel 20 



The science and practice of manuring, Dyke 21 



[Report of soil fertility work in Massachusetts], GasklU 21 



Experiments in fertilizing a crop rotation, Lyon 21 



Experiments with various nitrogenous fertilizers, Mitscherllch et al 22 



Availability of nitrate of soda and dried blood, Lipman and Blair 22 



The present status of nitrogen fixation. White 22 



The phosphate-rock industry in 1918 23 



Availability of phosphorus and potassium compounds, Lipman and Blair 23 



The world's supply of potash, Matignon 24 



Use of lime on Iowa soils. Limestone and fertilizer dealers, Corson 24 



Fertilizer analyses. Patten et al 24 



Analysis of fertilizers for 1918, Ctirry and Smith 24 



Analyses of commercial fertilizers and home mixtures, Cathcart et al 24 



Analyses of commercial fertilizers, bone, and lime, Cathcart et al 24 



Fertilizer registi-ations for 1919, Cathcart : 25 



AGBICtrLTUBAX BOTANY. 



[Activities of the] department of botanical research, MacDougal 25 



Development of conceptions included in growth, MacDougal 25 



The nature and course of growth in higher plants, MacDougal 26 



The growth mechanism of protoplasm, MacDougal 26 



Temperature and the hydration and growth of colloids, MacDougal 27 



Salt requirements for young and mature buckwheat in cultures, Shive 27 



Salt requirements In solution cultures for growth of buckwheat, Martin__ 27 



Form of phosphorus most available for buckwheat seedlings, Bancroft 27 



The toxicity of phosphates toward soy bean seedlings, Shive 27 



Effect of ammonium sulphate on soy beans in sand cultures, WolkofC 27 



Absorption of sodium and calcium by wheat seedlings. Reed 27 



Influence of root of growing plants on soil microorganisms, Neller 28 



Gas interchange in Mesembryanthemum and other succulents, Richards— 28 



Photosynthesis and respiration, Spoehr and Long 28 



The carbohydrate economy of cacti, Spoehr I 28 



