1919] CONTENTS. Ill 



Ecology of root systems, Weaver 327 



Influence of snow on different vegetation at the same altitude, Bouget 328 



Reciprocal transplants, Clements and Hall : 328 



Syncln-onisra in plant structures, Macfarlane 328 



Anatomy of liazel wood with reference to conductivity of water, Holnies_ 328 



Influence of iunnersion in solutions upon permeability, Williams 329 



Absorption of gold from colloidal solutions by fungi, Williams 329 



Behavior of stomata, Loftfield 329 



Variations in respiration of plants as related to age, Nicolas ^ 329 



Transpiration of trees, Weaver and Mogenson 329 



Light measurements, Clements 330 



Photosynthetic efticiency, Clements and Long 330 



Experimental pollination, Clements and Long 330 



Field and garden study of genera and species, Clements and Hall 330 



Variation and mutation in Epilobium, Clements 330 



Inheritance of leafing time in beeches, Raunkiser 331 



FIELD CKOPS. 



Farm crops, their cultivation and management, Gardner et al 331 



Productive farm crops, Montgomery 331 



[Report of field crops work in Arizona], Heard 331 



[Report of plant breeding work in Arizona], Freeman and Bryan 332 



Wyoming forage plants and their chemical composition, V, Hepner 333 



Farm crops, Zavitz 333 



Hay and pasture crops, grasses, clovers, etc., Zavitz and Squirrell 334 



Field experiments [in Ireland], 1918 334 



[Report of field ci'ops work in Assam], McKay and Meggitt 334 



Legumes, Sudan grass, and cereal crops for silage, Eckles 334 



Frost injury to grain and legumes, Fischer 335 



Soil inoculation for legumes, Albrecht 335 



The improvement of the barley crop, Hunter 335 



Late planted variety tests of corn, Cauthen 335 



Fertilizer experiments with cotton in Alabama, Williamson and Duggar 335 



Transmission of characters in potatoes, von Seelhorst 336 



Missing hills in potato fields: Their effect upon the yield, Stewart 336 



Handling and loading southern new potatoes, Grimes 337 



Rhodes grass, Tracy 337 



Culture and multiplication of Ilocano and Tagalog lowland rices, Romero_ 337 



Saving man labor in sugar beet fields, Moorhouse and Summers 337 



Bud variations in sugar cane, Poraeroy 337 



Spacing experiments with sugar cane, Mirasol y Jison 338 



Sweet potato storage, Johnson 3,38 



The synthetic production of wild wheat forms, Love and Craig 338 



Third biennial report State seed commissioner, 1917-18, Leth 339 



HORTICULTURE. 



Fruits, vegetables, and flowers, Gardner et al 839 



Report of nursery and market garden, 1918, Lister 339 



Evolution of the commercial greenhouse in relation to horticulture, Cobb_ 339 



[ReiMirt of experiments on lettuce growing], Johnson 339 



Growing tomatoes for the canning factory, Rosa 340 



The relation of phenology to fruit growing, Barnett 340 



Roeding's fruit growers' guide, Roeding__ 340 



[Varieties of fruit for British Columbia], Middleton 340 



Our best varieties of fruit, Bottner 340 



The improvenK>nt of fruit culture in Baluchistan, A. and G. L. C. Howard 340 



Report of the Fruit Experiment Station, Shillong, 1918, Holder 340 



Maintaining proper vigor in our fruit trees, Lewis 340 



Protecting the orchard by dusting, Reddick 340 



Orchard spraying experiments, Turney 340 



Fertilizing of apple orchards, Kraus 341 



Fertilization of apple orchards, Stewart 341 



Cultural methods and fertilization of the apple orchard, Oskamp 341 



Cost of producing apples in Illinois orchards, Stanford 341 



