IV CONTENTS. 



AGRICULTUKAL BOTANY. Page. 



A history of botany, 1S60-1900, Green 325 



Annual report of the Association for AppUed Botany 325 



Distribution and movements of desert plants, Spaldinu; 325 



On the<^ermination of old and mutilated seeds, Macchiati 326 



Influence of the seed bed on amount and uniformity of (germination, Muth .. 326 



Intensity of respiration and germinative ability, Ilausmann and Iwanissowa. . 326 



The respiration of the vegetative organs of vascular })lants, Nicolas 327 



Influence of physical factors on transj)iration, Sampson and Alleti 327 



Carbon dioxid assimilation and nutrition of plants with formaldehyde, Hokorny. 328 



Direct assimilation of ammonium salts by plants, Hutchinson and Miller 328 



The chlorin content of leaves, Vandevelde 328 



The acid excretion of roots, Aberson 328 



Some conditions for the formation of chlorophyll, Issatchenko 329 



Phosphorus in relation to chlorophyll, Brdlik 329 



Relation of intensity and duration of illumination to oat seedlings, Blaauw. . . 329 



The biological significance of nectar in the flower, Burck 329 



The influence of air moisture on the duration of vitality of pollen, Pfundt 329 



Some factors controlling fruit formation in Hymenomycetes, Wak(>field 330 



Tulip thieves, Plemper van Balen 330 



FIELD CROPS. ' 



Field experiments with farm crops, Saunders et al 330 



Reports on experiments with some new nitrogenous manures, Berry 333 



Report of the Aligarh Agricultural Station, 1909, Parr 334 



Report of the Partabgarh Agricultural Station, 1909, Hadi 335 



Fifth annual report of the Minnesota Field Crop Breeders Association 335 



Yields of cereals on different kinds of fallow cultivations, Bichikhin 335 



Identification of American brewing barleys on the Swedish system, Nilson 335 



The cotton plant: Its cultivation in various parts of the world, Girola 335 



The production and commerce of the feather grass of Algeria 336 



Report on variety tests of oats, Wright and M'Alpine 336 



Potato breeding questions and observations, Arnim-Schlagenthim 336 



Potatoes: Cultivation, manuring, varieties, and seed supply in Bengal, Smith. 336 



The influence of water content upon the value of beet seed, Hegyi 336 



[Report on experiments carried out on sugar plantations during 1907], Harrison. 337 



The sugar laws, Legier 337 



The importance of rotations in tobacco cidture, Chevalier 337 



Report on the tobacco industry in Ontario, Barnet 337 



Experimental work carried on in 1908 337 



Report on trials with varieties of wheat, Stewart 338 



Lime nitrogen as a means for the destruction of wild mustard, Heinrichsen. . . . 338 



Dry farming in Wyoming, Cooke 338 



HORTICULTURE. 



Horticultural work at the Canadian experiment stations, Macoun et al 338 



The seeds of horse-radish and the results from sowing them, Brzezinski. . . . 339 



On the mineral nutrition of the mushroom, Hebert and Heim 339 



Pineapple growing in Bataan and Bulacan pro^dnces, Cruz 339 



Grape culture: Planting, grafting and pruning, De Bano 339 



The hybrid direct bearers in the valley of the Rhone, Desmoulins and Villard. . 340 



Production of cacao in the French colonies, Berteau 340 



Hybridization in the Citrus genus and origin of the sweet orange, Trabut 340 



The latest developments in fig culture. Swingle and Rixford 340 



A new hawthorn-medlar graft hybrid, Daniel 340 



Notes on the native seedless persimmon, Woodburn 340 



Tillage v. sod-mulch, Hedrick 340 



Varieties of fruit trees recommended for the region north of the central Mesa. . 340 



The development of a picking table for the more important pip fruits, Junge . . 340 



The preparation of fruit and vegetables for market, Shaw 341 



Pre-cooling fruit, Kellogg 341 



Methods of preserving fruit fresh. Doty . ... 341 



Conservation of fresh grapes in granulated cork, Robert 341 



The exportation of fresh fruits from South Africa 341 



