CONTENTS. in 



Page. 



The law of minimum, von Riimker 519 



The influence of fertilizing on the resistance of grain to hail, Gaul 519 



A brief account of trials with lime fertilization, Bolin 519 



Lime-magnesia fertilizers, Marre 519 



Lime-magnesia ratio in the cultivation of grain, Piaciotta 519 



Sponges as a fertilizer, Smith 519 



Composts, Anstead 520 



Fertilizers in Japan, Gassett 520 



Report of analyses of commercial fertilizers collected during 1913 520 



AGRICULTURAL BOTANY. 



Introduction to botany, Bergen and Caldwell 520 



Popular botany: The living plant from seed to fruit, Knight and Step 520 



Plant life and plant uses, Coulter 520 



The useful plants of the Dutch East Indies, Heyne 521 



Northwest flora, Frye and Rigg 521 



Attempts to grow mistletoe on monocotyledons, Heinricher 521 



Ripening and rest period of mistletoe seeds and their germination, Ileinricher. . 521 



The role of acids in germination, Promsy 521 



The influence of light on seed germination, Baar 522 



Relationship between the weight of the bean seed and its germination, Harris . . 522 



Alcohol formation by sprouting wheat, Kostytschew and Scheloumoff 522 



The respiration of living and of killed wheat seedlings, Kostytschew et al 522 



Influence of location on leaf development of Tpomoea pes-caprse, Kamerling 522 



Is there mutual stimulation of plants through root influence? Lyon and Bizzell. 522 



Secretion by roots of substances toxic to the plants, Molliard 523 



The root nodules of the Podocarpese, Bottomley 523 



The function of calcium in plants, Faack 523 



The inutility of zinc in the culture of Aspergillus niger, Lepierre 523 



Inutility of zinc for culture of Aspergillus niger, Lepierre 523 



Zinc and Sterigmatocystis nigra, Coupin 523 



Zinc and Aspergillus, Lepierre 523 



Osmotic pressure and conductivity of yeast, beer, and wort, Dixon and Atkins. . 523 



Studies on the influence of electricity on plant growth, Schikorra 524 



Influence of radio-active emanations on vegetation, Stoklasa and Zdobnicky. . 524 



Influence of radio-activity on micro-organisms, Stoklasa 524 



The study of cold resistance by cereals, Gassner and Grimme 524 



The blackening of the leaves of Aitcuha japonica, Paine 524 



Studies on photosjTithesis, Puriewitsch 524 



FIELD CROPS. 



Cultivation of crops, Hoffman and Kostlan 525 



Addresses on plant breeding 525 



The storage of vegetable products of agriculture, Gregoire 525 



[Experiments with field crops], Watts et al 525 



Report on the botanic station, St. Kitts-Nevis^ 1911-12, Watts 525 



Annual report of the demonstration farm, Kahmpong, 1911-12 525 



Annual report of the Rajshahi Agricultural Station for the year 1911-12 525 



Annual report of the Rangpur Farm for the year 1911-12 525 



Fodder plants of Java, I and II, Backer 525 



Native permanent meadow v. seeded meadow, Schubert 526 



On the manuring of meadow hay, Porter 526 



Trials in seeding cereals in hills, Dumont 526 



The difference in drought resistance between clover and alfalfa, Sholtkewitsch . 526 



Agave in the West Indies, Trelease 526 



Three-year results with Turkestan alfalfa, Gydrfds 526 



Experiments \Nith a new form of barley, Schneider 526 



Thermotoxy, or factors in the growth of cotton in Eg^'pt, Balls 526 



The culture of cotton in Egypt, Ahmed el Alfi, trans, by Sebbagh and L^piney . 527 



The relation of cotton bu}dnw to cotton growing, Cook 527 



Waste, tensile strength, and Dleaching qualities of grades of cotton, Cobb 527 



Elephant grass, Stapf 527 



Phonolite meal v. 40 per cent potassium salt in fertilizing hops, Wagner 527 



Origin and home of the cultivated oats, Schulz 527 



Report on oat culture experiments in Saxony, 1910-1912, Steglich 527 



