1">17] CONTENTS. 



ni 



Winter foliation in beech, Weber 2^)4 



The action of light on the living organism, Schanz ".'.'.'*'.'.'.*....'.. 224 



The measurement of oxidation potential and its significance, Reed 224 



The significance of color changes in oxidase reagents, Reed . ' ""....... 224 



A comparative study of nutritive solutions, lakushkin 224 



The action of saline solutions on living plants, Devaux 224 



Relations between presence of magnesium and assimilation in leaves Andri 225 



A labile form of albumin and its relation to living protoplasm, Loew.' 225 



The organic nutriment of gi-een flowering plants, Bokorny 225 



Retention of chlorophyll in yellowed and fallen autumn leaves, Richter..... '. 225 



Abscission in Mirabilis jalapa, Lloyd ' 225 



Abscission, Lloyd 225 



Daily transpiration during the normal growth period, Briggs and Shantz ...... 225 



Self- warming in flowers of night-bloonung Cereus, Leick /_] 226 



Measurement of evaporation rates for short intervals, Johnston and Livingston ' '. 226 



A field auxanometer, Collins and Kempton \] 226 



FIELD CROPS. 



The influence of atmospheric electricity on crop development, Hedlund 227 



[Work with field crops on the demonstration farm at Sacaton, Arizona] 227 



Growing grain on southern Idaho dry farms, Aicher 227 



Dry farm grain tests in Montana, Atkinson and Donaldson 227 



Measuring hay in ricks or stacks, McClm-e and Spillman 227 



Experiments with potatoes and root crops, Fedorov 228 



Studies in Indian oil seeds. — I, Saiflower and mustard, Howard and Khan... 228 



Growth of legumes as influenced by lime, Laparan y Layosa 229 



Abaca fiber, Espino 229 



A study of four strains of beets, Bolotov 229 



Dwarf broom corns, Rothgeb 229 



A study of the effects of commercial fertilizers on corn, Montellano 229 



Maize grading, 1915, Walters 230 



Cotton breeding report for 1914, BoUand 230 



Cotton production in the United States: Crop of 1915 230 



A study of cowpea cultm^e, Constantino y San Juan 230 



Flax for fiber. — Its cultivation and handling, Adams 230 



Napier fodder or elephant grass (Pennisetiim purpureum), Walters 230 



Methods for the determination of the hull content of oats, Zade 231 



A study of the production of peanuts, Consunji y Tongco 231 



[Potato experiments], Whipple 231 



Influence of size of seed tuber on quantity and quality of the crop, Igonin 231 



The cost of potato production in Russia, Kotelnikov 232 



Green-maniuing rice, Sherrard 232 



Nitrogenous fertilizers for winter rye, Hasund 232 



Factors influencing the protein content of soy beans, Lipman and Blair 232 



Variations in sugar content of beet in relation to selection, Munerati et al 233 



Influence of defoliating sugar beets on their sugar content, Munerati et al 233 



Notes on the growth of sugar cane, Taluqdar 233 



Chemical changes dxiring the ripening of sugar cane, Mirasol y Jison 234 



Annual cropping, biennial cropping, and green manures on wheat, Madson — 234 



The irrigation of wheat, Harris 234 



Yellow-berry in wheat: Its cause as indicated by its composition, Headden. . . 235 



Witch weed or rooi-bloem (Striga lutea) , Walters 236 



The control of weeds by means of chemical substances, Gelpke 236 



HORTICULTURE. 



Diseases and pests of garden plants, van den Broek and Schenk 236 



Muck crops, Wilkinson - 236 



[Report of horticultural investigations], Whipple 236 



Notes on the newer varieties, Thayer 237 



Do we need new vaiieties of commercial fi'uits? Wickson 237 



Five years' experiments in orchard fertilization, Ballou 237 



Pruning investigations, Gardner, Magnes^', and Yeager 237 



Factors which influence regular bearing in an apple orchard, Gom-ley 240 



Arsenate of lime in combination with soluble sulpnur for apple spray, Sanders . . 240 



