CONTENTS. ni 



Page. 



Analyses and valuations of fertilizers, Cathcart et al 625 



Commercial fertilizers 625 



Fertilizers, 1915 625 



AGRICULTURAL BOTANY. 



Effect of elemental sulphur and of calcium sulphate on plant life, Pitz 625 



Boron: Absorption and distribution in plants and effect on growth, Cook 625 



Influence of radiations of radium on germination of oats, Lawrence 626 



Some effects of ethylene on the metabolism of plants, Harvey 626 



Rate of absorption of phenolic solutions by Hordeum vulgare, Brown and Tinker. 626 



Chemistry and structure of plant cell membranes, Konig and Rimap 626 



Studies in experimental morphology, Lundegardh 626 



Autoparasitism of Cassytha melantlia, Hardy 626 



Oxidation of ammonia or nitrification in plants, Maz6 627 



A study of nitrogen release by Azotobacter, I^Iol^r 627 



Carotinoids in plants, van Wisselingh _. 627 



Mode of formation of starch in rootlets of maize and castor oil, Guilliermond. . . 627 



Growth of the leaf blade, leaf sheath, and stalk of the sugar-cane, Kuyper 627 



Stomatal structure in sugar-cane, Kuyper 628 



The influence of temperature on phototropism, De Vries 628 



The physiology of pollination, Tokugawa. 628 



Cross-and self-fertilization and the results in heredity, Heukels 629 



The question of mitochondria as bearers of heredity, Nachtsheim 629 



The mutation factor in evolution with particular reference to (Enothera, Gates. 629 



The genotj-pic composition of some varieties of the same species, Tine Tammes . 629 



Notes on dissemination of Virginia creeper seeds by English sparrows, Harv^ey . 629 



FIELD CROPS. 



Report of the agronomist, Parsons 629 



Forage crops for the Colorado Plains, Kezer 630 



Analyses of maize and oats cultivated in eastern Uruguay, Puig y Nattino 630 



[A study of blue-grass seed] 630 



Experiments with Sea Island cotton. Sands 631 



The use of white mustard as a green manure plant, Wagner 631 



Experiments v.ith oats, Welton and Gearhart 631 



Further experience with Phalaris bulbosa, Breakwell 631 



"Dapog" method of rice culture, Apostol .• 631 



Factors influencing the protein content of soy beans, Lipman etal 632 



Effect of manganese sulphate on the jdeld of tiu-nips at Wisley, Chittenden 632 



Influence of time and method of preparing seed bed on winter wheat. Call 632 



The progressive development of the wheat kernel, II, Thatcher 633 



The effect of using many parallel plats in field experiments, De Vries 634 



HORTICULTURE. 



Report of horticulturist, Newman 634 



The Lamao Experiment Station, Wester 635 



Somatic segregation, Kraus 635 



The garden and farm almanac for 1916, edited by Seymour 635 



Two farm gardens, Keffer 635 



The home vegetable garden, Tompson 635 



[Growing vegetable seeds at the Central Experimental Farm in 1915], Davis. . . 635 



Experiments with cabbage, Myers 636 



Influence of rainfall on the composition of tomatoes, Bigelow 636 



Careful handling, precooling, and cold storage investigations 637 



Careful handUng, precooling, cold storage, and transportation investigations. . 637 



Maturity of fruits for precooled shipments. Smith 637 



New fruits originated at Minnesota Fruit Breeding Farm, Haralson 637 



Varieties of fruit for West Virginia, Alderman, Sutton, and Jeffries 637 



Economics of apple orcharding, Lewis and Vickers 638 



Economics in apple orcharding, Lewis and Vickers 639 



Packing and shipping peaches in Georgia carriers, Blake and Connors 639 



New or noteworthy tropical fruits in the Philippines, Wester 639 



Impro\-ing the production of Washington navels, Shamel 639 



Problems in walnut breeding, Batchelor 639 



