1919] CONTENTS. Ill 



Page. 



Behavior of plants in unventilated chambers, Newcombe SliJ 



I Temperature and seasonal progress of vegetation], Hitter 819 



Demonstration of methods for the study of stomatal action, Pengelly 819 



Conductivity as a measure of permeability, Osterhout 819 



Note on effect of dilfusion on conductivity of living tissue, Osterhout 819 



Method of measuring electrical conductivity of living tissues, Osterhout__ 819 



A coniparatve study of permeability in plants, Osterhout 819 



Structures of coniferous woods and penetration by preservatives, Kitchen. 819 



Salt ratios in soil cultures, Hibbard 820 



[Mineral nutrient solution for maize], Maze 820 



Plant ecology and its relation to agriculture. Waterman 820 



Dwarf shore' floras, Clark 820 



Notes of the introduced flora of the Douglas Lake region, Gleason 820 



Notes on the Michigan flora, Farwell 821 



A botanical trip to Mexico, I-II, Hitchcock 821 



Note on inheritance in Pliaseolus, Brotherton 821 



Mendelian segregation in (Enothera prutincola, Cobb and Bartlett 821 



Studies in classification and nomenclature of bacteria, VIII-X, Buchanan- 821 



Comments on the evolution and classification of bacteria. Breed et al 821 



Bacteria which survive in fractional sterilization, Eckelmann 821 



Studies on proteolytic enzyms of soil fungi anil Actinomycetes, AVaksman_ 822 



i'lKLD CROPS. 



Crop rotation and soil fertility, Doneghue 822 



I Field crops work at Hettinger, N. Dak., 1913-1918], Lanxon et al 824 



[Report of field crops work in Montserrat, 1917-18], Watts 825 



[Field crops work at St. Kitts-Nevis stations, 1910-17 and 1917-18], Watts_ 825 



[The Woburn field experiments, 1918], Voelcker 825 



[Report of field crops work in Mysore, 1916-17] 82G 



[Report of field crops work in the United Provinces, India, 1918], Burt__ 826 



Grain yields for 1919, Stookey S2G 



Statistical notes on cereals 820 



[Fiber plants of Brazil], Correa 827 



The agaves, Berger 827 



Australian saltbush, McKee 827 



The cultivation of barley in Chile, Opazo G 827 



The barley of Tripoli, De Cillis 827 



Buckwheat, Leighty 827 



Selection of pseudo-starchy endosperm in maize, Jones 827 



[Cotton culture in French colonial possessions] 828 



Cawnpore-American cotton: Its improvement, Burt and Haider 828 



Report of the Indian Cotton Committee 828 



Inheritance of certain characters in the cowpea, Harland 828 



Henequen in Yucatan, Barba , 829 



A giant legume as a forage crop for Cuba, Calvino 829 



Production of late or main-crop potatoes, Stuart 829 



Industrial and nutritive value of potato in Ireland, Joliuson and Boyle 829 



Rice experiments [in Trinidad], 1915-1918, de Verteuil and Brunton 829 



Cross-pollination of sugar cane, Cowgill 830 



Varieties of sugar cane in Porto Rico, Earle 830 



Breeding timothy at Svalof, Witte 830 



Inheritance of branching habit in tobacco, .Johnson 830 



Flue-cured tobacco in Canada, Digges and Freeman 831 



The 1919 yields from ten wdieat fields in " Egypt," Hopkins et al 832 



[The cultivation of the greater yam (Dioscorca alata)], Burkill 832 



The longevity of Bacillufi radicicola on legume seeds, Fellers 832 



Farm weeds of North Carolina, II, Burgess and Waldron 833 



HOETICULTUKE. 



Aerial fertilization of plants with carbon dioxid, Cummings and Jones 833 



Is cooperative marketing applicable to Illinois conditions? Lloyd 834 



Some economic aspects of fruit and vegetable storage, Lloyd 834 



Olneya beans. Cook 834 



Studies on the biology and culture of superior mushrooms, Boyer 834 



