IV CONTENTS. [Vol. 35 



FORESTRY. 



Page. 



Suggestions as to possibilities of silviculture in America, Femow 746 



The woodlot: Its present problems and probable future status, Tillotson 746 



Forest taxation as a factor in forest management, Hutton and Harpman 746 



Hewn-tie v. saw-timber rotations, Korstian 746 



Christmas tree plantations, Chittenden 746 



Hylobius pales as a factor in reproduction of conifers in New England, Cai'ter. . 747 



Water requirements and growth of young cypress, Mattoon 747 



The various osiers cultivated in France and neighboring countries, Camus 747 



Early European history and botanical name of the tree of heaven. Swingle 747 



The English names of some trees, Ashe.. .._. 747 



A forest census of Alabama by geographical divisions, Harper 748 



Forests of Crater Lake National Park, Pernot 748 



Administrative report of the Virginia state forester, 1915, Jones 748 



The growing stock as a criterion of normality, Recknagel 748 



Top diameters as affecting frustum form factor for longleaf pine. Chapman. . . . 748 



The factor of top diameters in volume tables based on log lengths, Chapman. . 748 



The Biltmore stick and the point of diameter measurements, Bruce 748 



Utilization of wood waste by chemical means, Weiss 748 



DISEASES OF PLANTS. 



[Plant diseases in Porto Rico], Stevenson 748 



Pai'asitic Rhizoctonias in America, Peltier 749 



The susceptibility of grains to smuts and rusts, von Kirchner 749 



Resistance of wheat to rust, Comes 749 



Treating wheat against Fusarium, Penicillium, and stinking smut, Hiltner 749 



Green vitriol (ferrous sulphate) as a preventive of take-all, Darnell-Smith. . . . 750 



Storage rots of economic aroids, Harter 750 



Beets attacked by Cercospora beticola, Saillard 750 



New diseases of cucumber in Sweden, Eriksson — ._ 750 



Experiments with clean seed potatoes on new land in southern Idaho, Pratt. . 751 



The disease of potatoes known as "leak, " Hawkins 751 



Some properties of the \tju8 of the mosaic disease of tobacco, Allard 751 



Mosaic disease of tobacco and tomatoes 752 



Armillana mellea killing fruit trees 752 



Spraying experiments and apple diseases in 1915, Morse 752 



The treatment of peach leaf curl, Gandolfi 753 



The 1915 outbreak of dowTiy mildew in France and Italy, Pastre 753 



Downy mildew, its manifestations and directions for its control, Ravaz 753 



Cupro-ferric sprays for downy mildew and chlorosis, Donadieu 753 



Treatments for downy mildew and the preparation of copper sprays, Degrully . 754 



Llottle leaf of citrus trees in relation to soil conditions, Briggs et al 754 



Fighting Pythiaajstis citrophthora, in the citrus orchards, Fawcett. ._ 754 



A disease of cultivated perennials caused by Sclerotium rolfsii, Peltier 754 



Two timber-destroying fungi, Cleland and Cheel 755 



Anomalies of growth in Pinus, von Tubeuf 755 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Ground squirrel control, Shaw 755 



Important foreign insect pests on imported nursery stock in 1915, Sasscer 755 



Inspection facilities in the District of Columbia, Sasscer 755 



Foreign pests recently established in New Jersey, Weiss 755 



On the Hawaiian work in introducing beneficial insects, Howard 755 



Experiments on the use of cyanid of potassium as an insecticide, Wellhousc.. . 755 



Proceedings of the Entomological Society of British Columbia 755 



Some insect enemies of shade trees and ornamental shrubs, Blackman and Ellis . 756 



Insects in their relation to the chestnut bark disease, Craighead 756 



Controlling the coulee cricket, Melander 756 



A new species of Thripoctenus, Williams 756 



The false cabbage aphis (Aphis pseudobrassicse) , Davis and Satterthwait 756 



The western wheat aphis (Brachycolus tritici), Parker 757 



Plant lice injurious to apple orchards. — I, Parrott, Ilodgkiss, and Lathi'op 757 



Apple aphids and their control. Hall 757 



Some grass-feeding mealy bugs, Cockerell 757 



