II CONTENTS. [Vol. 41 



Page. 



Indicators for acidimetric determination of horic acid, Presclier 313 



The alkalimetric determination of small amounts of magnesium, Hibbard_ 313 



Standards of purity for food products '. 313 



Analyses of flours for percentage extraction, Prandi and Perracini 313 



The milling grade of rye flour, Gerum 313 



The marc content of sugar beets and its determination, Claassen 313 



Critical temperature of solution applied to analysis of fats, Olivari 314 



Methods for sampling and analysis of soaps and soap products, Campbell- 314 



Some notes on paint analysis, Hough 314 



Acid tests on enamel ware, Collins 314 



Desacchariflcation of molasses with lime by extraction of .iuice, Daude — 314 



Date pasteurizing and ripening apparatus, Vinson and Catlin 314 



Reaction products of alkali-sawdust fusion, Mahood and Cable 314 



METEOKOLOGY. 



The importance of climatology to tropical agriculture, McLean 315 



INIeteorological observations at Massachusetts Station, Ostrander et al — 315 



Meteorology report for 1917, Hepner 315 



Measurements of precipitation under trees, Linke 315 



Report of Committee for Investigation of Atmospheric Pollution, 1917-18_ 315 



SOILS — FEETILIZEBS. 



Are soils mapped under a given type name closely similar? Pendleton — 316 



Field operations of the Bureau of Soils, 1914, Whitney et al 317 



Soil survey of Howard County, Ai'k., Beck et al 317 



Analyses of soils of DeKalb County, [Ga.l, Worsham et al 317 



Analyses of soils of Dougherty County, [Ga.], Worsham et al 317 



Analyses of soils of Jackson Coimty, [Ga.], Worsham et al 318 



Analyses of soils of Polk Coimty, [Ga.], Worsham et al 318 



The soils of Anne Arundel County, Britton and Zappone 318 



Soil survey of Barbour and Upshur Counties, W. Va., Latimer 318 



Arable lands 318 



Fertility survey of the Egyptian Delta, Keeling 318 



Malayan rubber and coconut soils, Barrowcliff 319 



The effect of organic matter on soil reaction, Stephenson 319 



Relation of lime requirements of soils to retention of ammonia, Howard — 320 



Toxicity of "alkali" salts, Singh 320 



Kotes on recent work concerning acid soils. Sharp and Hoagland 321 



Rate of solution of atmo.spheric nitrogen and oxygen, Adeny and Becker__ 321 



Can we predict prol)able fertility from soil biological data? Burgess 321 



Cause of unproductivity of " raw " subsoils in humid regions, McMiller__ 322 



Inhibition of injurious effects of alkali salts in soils, Lipman and Gericke_ 322 



Farm manure: Its production, conservation, and u.se, Fippin 822 



Composition of pasture as influenced by fertilizers, Skinner and Noll 323 



Nitrate in Amargosa Valley, southeastern California 323 



Nitrogenous fertilizers: Their use in India, Hutchinson 323 



Information and suggestions on the use of phosphorus, McCool et al 323 



Florida's soft rock phosphate 323 



Effect of sulfofication and nitrification, Ames and Richmond 324 



Effect of sulfofication and nitrification, Ames and Boltz 324 



Summary of the potash situation 325 



Some details about the Alsatian potash fields 325 



Potash content <if blast furnace charges, Gellert 325 



Electro-potash, and its effect upon mineral soils, Ehrenberg et al 32(> 



Limestones of Canterbury as a source of phosphate. Wild and Speight — 326 



The action of some common soil amendments, Greaves and Carter 326 



Use of sludge as a fertilizer, Hambleton 326 



Fertilizer, Lopez Dominguez 326 



International movement in fertilizers and chemical products, 1918 327 



AGRICUT.TXTRAL BOTANY. 



[Plant studies], Harris 32T 



[Plant ecology], Clements 327 



The phytometer method, Clementsv W' eaver. and Jean 327 



Permanent quadrats, F. E. and li Clements and Loftfield 32T 



