1919] CONTENTS. m 



AGRICULTURAL BOTANY. 



Page. 



Catalase and oxidase contents of seeds, Crocker and Harrington 222 



Stimulative action of zinc sulphate on Aspergillus niger, I, Steinberg 222 



The nature of the chondriome and its role in the cell, Dangeard 223 



Development of tube in microspore of Pinus sylvestris, Harvey 223 



Further results in desiccation and respiration of Echinocactus, Long 223 



Determination of acidity in plant tissues, Richards 223 



Dynamical aspects of photosynthesis, Osterhout and Haas 223 



Effects of rest and no rest periods upon growth of Solanum, Gericke 223 



Regeneration of Bryophyllum calycinum, Braun 224 



Healthy and sick specimens of Bryophyllum calycinum, Loeb 224 



Chemical basis of correlation, I, Loeb . 224 



The law controlling the quantity and rate of regeneration, Loeb 224 



Studies of flower number per head in Cichorium intybus. Stout and Boas_ 225 



Inheritance studies in Pisum, III. Inheritance of height in peas, White 225 



Bearing of heterosis upon double fertilization, Jones 22ft 



Abnormalities in Nicotiana, Allard 226 



Sexuality in RMzina undulata, Fitzpatrick 226 



Polyembryony in Quercus alba, Harvey 226 



Mistletoe [parasitic on] mistletoe, Brown 226 



Ecology of northern Michigan dunes : Crystal Lake Bar region, Waterman. 226 



FIELD CROPS. 



Experiments in field technique in plat tests, Amy and Hayes 226 



Factors affecting the depth of sowing various crops, Harris and Maughan_ 227 



A drill for seeding nursery rows, Hill 228 



[Work with field crops in Canada] 228 



[Report of field crops work in Montserrat, 1916-17] 228 



[Resum6 of field crops work in the Philippines during 1916], Burton 228 



Fallow and green manuring experiments on sandy soil at Askov, Hansen. 229 



Moorculture Association's field experiments in 1917, von Feilitzen 229 



[Report of field crops work in Nigeria, 1916] 230 



[Report of field crops work in Rhodesia], Nobbs 230 



[Report of field crops work in Queensland, 1916-17] 230 



[Report of field crops work in Punjab], Roberts. Fateh-ud-din, and Singh. 230 



[Report of field crops work in United Provinces, Prasad and Sharma 230 



[Report of field crops work in Fiji, 1916], Knowles 231 



Fodder crops on reclaimed swamp lands, Spafford 231 



The fodder pulses, meth, bhringi, and mashyem kalai, Ghosh 231 



The principal forage crops of the Philippines, Kingman and Doryland.. 231 



Important root crops of the Philippines, Kingman and Doryland 231 



Indian trade in oil seeds 231 



Clover and timothy at different rates of seeding, Rhodin 231 



Experiments with strains of clover and grass, III, 1914-1917, Lindhard— 232 



Methods in cereal investigations at Cornell Station, Love and Craig 232 



Small grain investigations, Love and Craig 233 



Growth of wheat (Triticum) and corn (Zea), MacDougal 233 



Red Rock wheat and Rosen rye, Spragg 233 



Milling and baking tests of einkorn, emmer, spelt, etc., Le Clerc et al 234 



Preliminary notes on barleys indigenous to Argentina, Hauman 234 



Hastening germination of Bermuda grass seed by sulphuric acid, Bryan.. 234 



The castor-oil plant, Dubard and Eberhardt ., 234 



The castor-oil plant in northern Africa, Couston 234 



Origin of the " Moro " corn. Wester 234 



Scientific research and the cotton industry, Berthey 234 



Cotton experiments, 1917, Brown and Ames 234 



Environment and varietal differences influencing cotton fruiting, Ewing. 235 



The time at which cotton uses the most moisture, McClelland 23ft 



A plant industry based upon mutation, Kearney 237 



Cotton variety tests, Lewis and McLendon 237 



Meade cotton, Cook 237 



A simple method of selecting heavy seed in cotton, Kottur 237 



Oil content of cotton seed as influenced by variety and selection, Rast__ -3^ 



Cotton production and distribution, season of 19i6-17 238 



