1918] CONTENTS. HI 



Page. 



Some unusual featiu-es of a subarctic soil, Pulling 732 



The western flower guide, Saunders 732 



Flora of the Rocky Moim tains and adjacent plains, Rydberg 732 



Marking microscope slides, Bryan 732 



FIELD CROPS. 



Relation of size of seed to yield of small grain crops, Kiesselbach and Helm 732 



The effect of weeds upon cereal crops, Brenchley 734 



Wheat-rj^e hybrids, McFadden 735 



Winter forage crops, Kennedy 735 



Report of department of agriculture [of New South Wales] for 1916, Valder 735 



[I^eld crops work in Java], van Rossem 735 



The production of alfalfa seed in southern Idaho, Aicher 735 



Barley for New York, Love and Bussell 736 



Effect of hydrogen and hydroxyl-ion concentration on barley, Hoagland 736 



Inheritance of endosperm color in maize, AVhite 737 



New place effect in maize, Collins 738 



Observations regarding the com crop of 1917 739 



Selecting and testing seed com, Goodman 739 



Cotton in San Joaquin Valley, Gilmore 740 



Cotton production in the United States : Crop of 1916 74O 



Oats investigations, Kiesselbach and Ratcliff 74O 



The deep-water paddy of Orissa, Rout 74I 



Soy beans, Schmitz ; 74I 



Selection experiments with Deli tobacco. Honing 74I 



Comparative anatomy of wheat, Triticum albidum and T. erythrospermum, Komar. 741 



The improvement of wheat [in Argentina], Backhouse 741 



Geography of wheat prices, Zapoleon 742 



Seed reporter 743 



Noxious weeds in New Zealand, Cockayne 743 



HORTICULTURE. 



Variability of ^delds of fruit trees in field trials, Batchelor and Reed 743 



Abscission of flowers and partially developed fruits of the apple, Heinicke 745 



The common honeybee as an agent in prime pollination, Hendrickson 747 



Pruning the seedless grapes, Bioletti 747 



The mango in Porto Rico, Kinman 747 



Report of the horticulturist, Kinman 748 



Report of the assistant horticultiuist, McClelland 749 



Bush beans in the greenhouse, Green 749 



Heredity studies in the morning-glory (Ipomoza purpurea), Barker! 750 



FORESTRY. 



A manual for northern woodsmen, Cary 75I 



State forest administration in South Australia for the year 1916-17, Gill 751 



A few notes on bamboos 751 



Incense cedar, ]\Iitchell 751 



Note on kokan or lampatia timber (Dualanga sonneratioides) , Pearson 751 



Contraction and warping in Pinus longifolia timber while seasoning, Pearson 751 



Comparative yearly volmne increments of certain Indian tree crops, Marsden . . . 751 



Imports of tirnber into British India during the years 1912-13 to 1916-17 751 



Lumber used in the manufacture of wooden products, Nellis 751 



DISEASES OF PLANTS. 



Embryomas in plants (produced by bacterial inoculations). Smith 752 



The British species of Phomopsis, Grove. 752 



[Cotton rust investigations in Texas], Olive 752 



Peronospora on hemp, Peglion 753 



Conditions influencing the distribution of potato blight in India, Dastur 753 



A potato parasite new to Italy, Peyronel 753 



Irrigation experiments on apple spot diseases, Brooks and Fisher 753 



The tar treatment for court-nou^, Ravaz 754 



