CONTENTS. m 



Page. 



Formation of anthocyan pigments. — V, Chromogens of white flowers, Jones. . . . 421 



Studies of irritability in plants. — III, Formative influence of light, Peirce 421 



Replacement of zinc by uraniiun in cultures for Aspergillus niger, Lepierre 422 



Some relations between salt plants and salt spots, Cannon 422 



Town smoke and plant growth, Crowther 422 



The use of the manometer in sap movement, Reinders 422 



Structure and life history of bacteria, Benecke 422 



Report of the imperial agricultural bacteriologist, Hutchinson 422 



Studies with stenle cultures of higher plants, Schulow 423 



The prevalence of Bacillus radicicola in soil, Kellerman and Leonard 423 



Correlation studies of some hybrids, Tammes 424 



A striking correlation in the peach, Hedrick 424 



Is the biennial habit of OEnothera races constant? Atkinson 424 



Seeds and plants imported from January 1 to March 31, 1912: Inventory No. 30. 424 



FIELD CROPS. 



[Experiments in field crops], Schollander 424 



New work in dry farming, McOmie 426 



Irrigation, cultivation, and drainage experiments, Kriiger 426 



Field experiments, 1911 427 



Report on cooperative variety tests, 1911, Bolin 427 



Reclamation of sand areas, Macpherson 427 



Grass investigations in the Ozark upland, Miller and Hutchison 427 



Some new grasses for the South, Oakley 428 



Grasses at Rualfura, Green 428 



Cultivation of forage plants, Misson 428 



Cereal experiments in the Texas Panhandle, Ross and Leidigh 428 



The chemical composition of atavistic beets, Urban 430 



Cotton, Scherffius _. 430 



Improved methods of handlmg and marketing cotton, Brand 430 



Cotton growing in Egypt, Schmidt 431 



Cotton growing in India, Schmidt 431 



Flax experiments at Dooriah during the year 1911-12, Vandekerkhove 431 



The culture of lupines and mustard, Dumont 431 



On the growth of orchard grass and tall oat grass, Lindhard 431 



Influence of hilling on the yield of potatoes, Dumont 431 



Experiments with root crops, Helweg 431 



• Cooperative tests with soy beans in 1912, Williams and Welton 432 



Sugar beet culture in England , Halstead 432 



Sugar beet investigation in the Cape Province, Juritz 432 



The world's cane-sugar industry, past and present, Prinsen Geerligs 432 



Wheat experiments on the botanical areas, Cawnpore, Leake and Prasad 433 



Mutation m a variety of pure-bred wheat, Passerini 433 



Asepticizing pure seeds, Arcichovsky 433 



Danish seed control, 1911-12, Dorph-Petersen 433 



A new weed exterminator, Arthur 433 



HORTICULTURE. 



Hybridization experiments with stocks, peas, and beans, von Tschermak 433 



The chemistry of the floral pigments, Keegan 1 434 



Recent investigations on Brassica grafts, Daniel 434 



Hybridization experiments with peppers, Griffon and Pichenaud 434 



Tomato investigations, Boyle and Abbott 434 



The effect of fertilizers on variation in corn and beans, Shaw 435 



The California vegetables in garden and field, Wickson 435 



Lists of publications on vegetable topics, Greiner 436 



Differences in varieties of fniit and truck crops as to disease, Norton 436 



Disease susceptibility of apple varieties in Ohio, Selby 436 



Spraying: New methods, materials, and ideas, Watkins 436 



Promising new fruits, Taylor and Gould 436 



The precooling of fruit. Cooper 4?S 



[The lateral shoot-forming tendency of various fruit trees], Schindler 430 



On the root development of fruit trees, Kjoemer 437 



Investigations on the germination of poUen of fruit trees, Manaresi 437 



