CONTENTS. m 



Page. 



Chondriosomes in living plant cells, Maximow 217 



Studies on water conduction by dicotyledonous leaves, Rippel 217 



The resistance offered by leaves to transpirational water loss, Li-vingston 217 



Photochemical effects from mercury vapor lamp and sunlight, Kluyver 218 



Light as a factor inducing plant succession. Gates 218 



The mode of action of weak solutions of electrolytes on germination, Micheels. . 218 



Limits of germination of seeds after being placed in salt solutions, Lesage 218 



Effects of using salt solutions for watering and sprinkling plants, Kuijper 218 



Displacement by water of nitrogenous and mineral materials in leaves, Andr6. . 218 



Effect of some nitrogenous soil constituents on growth, Schreiner and Skinner. . 219 



The significance of sugar in the tubers of Solanum tuberosum, Butler 219 



Role of manganese in production of conidia of Aspergillus niger, Bertrand 219 



The influence of boron compounds on plant growth, Haselhoff 219 



Role of oxidases in formation of anthocyanin pigments, Keeble and Armstrong. 219 



On the presence of diastase in certain red algse, Bartholomew 220 



An optimum culture medium for a soil fungus, Pollock 220 



Studies in bacteriological analysis of Indian soils, I, 1910-11, Hutchinson 220 



On Actinomycetes in soils, Munter 222 



Hypertrophied action of products elaborated by Rhizobium radidcola, Molliard. 222 



An efficient electrical incubator, Conn and Harding 222 



FIELD CROPS. 



[Field crops work at Canadian stations and farms in 1911], Grisdale et al 222 



[Field crop experiments], Scott 224 



Report of the agronomist, McClelland 224 



Growing crops in western Nebraska, Snyder and Burr 225 



[Field crops work at the Williston substation, 1910], SchoUander 225 



[Field crops work at the Williston substation, 1911], SchoUander 226 



Agriculture on the Yuma reclamation project, Scofield 226 



The Rothamsted Experiment Station, 1843-1911, Hall 226 



[Variety and manurial experiments in Ireland], Wilson 228 



Variety test with oats, wheat, beans, and beets, Merkel 228 



[Wheat, oats, and potato tests], Despeissis 228 



Report of Dumraon Experimental Station, 1911-12, Sherrard 228 



Legume inoculation, Prucha 228 



Report of assistant botanist. Belling 228 



Effects of cross-pollination on size of seed in maize, Collins and Kempton 229 



Corn production. Center 229 



Grow corn that will ripen, Shepperd 229 



The wild prototype of the cowpea, Piper 229 



A comparison of Mammoth and Spanish peanuts in central Iowa, Clark 230 



Good seed potatoes and how to produce them, Stuart 230 



Changes in Irish potatoes during storage, Appleman 230 



The determination of sulphur and chlorin in the rice plant, Thompson 231 



Sudan grass, a new drought-resistant hay plant. Piper 233 



Instructions for conducting comparative experiments with sugar beets, Zaleski. 233 



The world's sugar production, with statistics, Ziegler !^ 233 



Fertilizer experiments with taro, McGeorge 233 



Quebec experimental tobacco stations, 1911, Chevalier 233 



The culture of tobacco in Gironde, Trichereau 233 



Vetch growing in the South Atlantic States, Smith 233 



Durum wheat, Salmon and Clark 233 



HORTICTJLTURE. 



Report of the horticulturist, Higgins 234 



[Horticultural work at Canadian stations and farms, 1912], Grisdale et al 235 



Report of the assistant horticulturist, Hunn 235 



Report of the horticultural testing fields from 1907 to 1911, Bonthuis 235 



Tin cans versus pots for seedling plants, Wilcox 236 



Suggestions on preparation and use of spray formulas, Bentley 236 



The composition of irrigated and nonirrigated fruits, Jones and Colver 236 



[Orchard and small fruits], SchoUander. 237 



Apples and peaches in the Ozark region, Gould and Fletcher 237 



[Citrus experiments], Collison 237 



