11 CONTENTS. . [Vol.43 



METEOKOKOUY. 



Page. 



Inflnonro of meteoroln^'icnl phonomona on plant growth -"T 



Observations at Massacluisctts Station, Ostrander and Smith 207 



Fifteentli report on nit-teorolo^'ical ubservations at Wisley, Curtis 207 



Location of corn l)i>lt as dependent on inclination of earth's axis, Redway_ 207 



IManual of nieteorolof^y. IV, Shaw 208 



The study of the weather, Chapman 208 



Results of rainfall observations in Australia, Hunt et al , 208 



Australian rainfall and wheat yield 208 



Summer and winter rainfall and the wheat yield, Hunt et al 208 



Some notes on California rainfall, Crunsky 209 



SOILS FERTILIZERS. 



Soil makinp, Russell 209 



The care of the soil, Hodsoll 209 



Soil survey of Morrill County, Nebr., Hayes et al 209 



Soil sui-vey of Traill County, N. Dak., Button and Nichols 209 



The water economy of soil, Tiich 210 



Influence of variations of j^round-water level on soil utilization, Koehne — 210 



Moisture equivalent in relation to mechanical analysis of soils, Middleton_ 210 



A new soil elutriator, Gardner 210 



Sampling soil plats. Bear and McClure 210 



Influence of sand on concentration of a nutrient solution, Shive 210 



Colorimetric determination of hydrogen-ion concentration, Gillespie 211 



The determination of ammonia in soil, Matthews 211 



Soil reaction, Demolon 212 



Effect of aeration on lime requirement of muck soil, Walker 212 



Reaction of soil as influenced by green manures. Howard 212 



Decomposition of clover tops in soil, Whiting and Schoonover 212 



Determination of degree of decomposition of moor and peat, Keppeler 213 



The human acids, Oden 1 213 



Nitrate production in field soils in Illinois, Whiting and Schoonover 214 



Formation of nitrates following red clover and timothy, Lyon et al 215 



Nitrification in semiarid soils, Kelley 215 



Some soil studies, Headden 21G 



The isolation and study of nitrifying bacteria, Gibbs 216 



Inoculation of legumes with nitragin 217 



The protozoan fauna of the soils of New .Jersey, Fellers and Allison 217' 



The value of barnyard manure on Utah soils, Harris 218 



Utilizing soil potash by means of intermediary crops, Blair 218 



Nitrogen Products Committee. — Final report 218 



The present status of nitrogen fixation, White_ 219 



Nitrogen and hydrogen from ammonia, Davis and Olmstead 220 



Production of ammonia from cyanids and briquets, Heise and Foote 220 



Ammonia nitrogen from liquid manure, Lemmermann and Wiesemann 220 



Relative availability of nitrate and commercial organic nitrogen, Blair 220 



Vegetation experiments with new nitrogenous fertilizers, Scholz 221 



Nitrogen bacteria fertilizers, Nolte 221 



New regulations for purchase of nitrogenous fertilizers, Nolte 221 



Utilizing Imhoff sludge on land at Plaintield sewage works, Downes 221 



Report on connnercial fertilizers. 1919, .Jenkins and Bailey 221 



Fertilizer analyses [and registrations], AVoods and McDonnell 221 



AGKICULTUKAI. BOTANY. 



Notes on trees and shnibs in the vicinity of AVashington, Ashe 222 



New and old species of Opuntia, Griffiths 222 



New species of Uredinere, XI, Arthur 222 



The ancestry of maize. — A reply to criticism, AVeatherwax 222 



The pure line hypothesis and inheritance of small variations, AA'arren 222 



Half mutations and mass mutations, De Vrie.s 222 



A petunia hybrid, Rasmuson 222 



The CF]notheras as nuclear chimeras, Lotsy et al 223 



Some applications of the quadrat method, Gleason 223 



Ecology of Tilia amci'icana. — I, Foliar transpiring power, Cribbs 223 



