1917] CONTENTS. Ill 



Page. 



Immobility of iron in the plant, Gile and Carrero 128 



The poisonous influence of lithium salts on plants, Frerking 129 



The orientation of primary terrestrial roots, Holman 129 



Thermometric movements of tree branches at freezing, Trowbridge 129 



The mechanism of movement in the leaves of Dionaea, Brown 129 



Sexual variations of the inflorescences and flowers in Codi^um, Chifflot 130 



Hybridization between a wild and cultivated crucifer, Trouard-Riolle 130 



Recolonization of cultivated land allowed to revert, Brenchley and Adam .... 130 



A text-book of general bacteriology, Jordan 130 



Aspergillus nigcr group, Thorn and Currie 130 



Agar agar for bacteriological use, Noyes 131 



FIELD CROPS. 



[Field crop experiments] 131 



[Work with field crops at the Belle Fourche Farm in 1915], Aune 131 



[Work vath field crops on the Huntley Farm in 1915], Hansen 132 



[Work with field crops on the Scottsbluff Farm in 1915], Knorr 132 



[Work with field crops on the Truckec-Oarson Farm in 1915], Headley 133 



[Work with field crops on the Yuma Farm in 1915], Blair 133 



Cereal experiments on the Cheyenne Experiment Farm, Jones 133 



Effect of different nitrogenous fertilizers on oats and mustard, Hiltner 134 



Anomalous endosperm development in maize and bud sports, Emerson 134 



Yields of different varieties of corn in Hlinois, Biu-lison and Allyn 135 



Variety tests of corn, Hutchison, Evans, Hackleman, and McDonald 135 



Study of the root system of flax, Modestov 135 



[The effect of freezing on flax seed], Shulov and Morozov 136 



Changes in specific gravity of Dotato tubers during the rest period, Sz^ll 136 



[Variety tests with potatoes], Gaskill 136 



Commercial handling, grading, and marketing of potatoes, More and Borland. . 136 



The possibilities of sugar beet culture in Washington, Cardiff 137 



Experiments with Marquis wheat, Ball and Clark 137 



HORTICULTUHE. 



Encyclopedia of horticulture, compiled by Pucci 137 



[Horticultural investigations on Yuma Reclamation Project in 1915], Blair. . . 137 



[Experiments with vegetables on the Truckee-Carson Project], Headley 137 



Manual for the raising of garden seed, Dsehnfeldt 137 



[Report of] the asparagus substation. Concord, Brooks 137 



De Vriesian mutation in the garden bean, Phaseolus vulgaris, Harris 138 



Marketing and distribution of western muskmelons, Scmeussner and Kitchen . 138 



The melons on the market in Paris, Buisson 138 



Some results of horticultural investigations] 138 



Orchard trees and small fruits on Huntley Reclamation Project], Hansen 140 



^lodern propagation of tree fruits, Brown 140 



Some figures on the cost of bringing orchards into bearing 140 



Some improvements in the packing and transport of fruit in India, Howard. . . 140 



Notes on Pomacese of upper South Carolina, Ashe 140 



The pollination of the pomaceous fruits. III, Kraus and Ralston 140 



The fruiting of trees in consecutive seasons, Pickering 140 



Peach gro\ving in Ontario, Clement and Harris 140 



The persimmon in California, Fujii 141 



State bog report, Franklin 141 



Is the hybrid origin of the loganberry a myth? -_ 141 



Methods of reproducing grapes by long cuttings and short cuttings, Ricome 141 



Some recent operations and experiments with bud variations, Shamel 141 



Pruning the Washington naval orange, Hodgson 141 



Report on manurial experiments 141 



[Cacao experiments, 1914-15], De Vertuil 141 



Cacao, van der Laat 141 



[Experiments with coffee in Surinam], Van Drent 141 



The cultivation and preparation of coffee for the market, Ugarte 142 



New and successful method of rooting date palm offshoots, Coit 142 



Colonial plants. — Perfume, tincture, and tannin plants, and tobacco, Jumelle. 142 



Colonial plants. — Industrial plants, Jumelle 142 



Sources of supply of hazelnuts 142 



