XI) EX 



Page 



Acer spp. See Maple. 



Acid, sulphuric, production commercially from smelter gases, suggestion 10-11 



Aesculus hippocastanum. See Chestnut, horse. 



Alder, red heart -rot, susceptibility 37 



white heart -rot, susceptibility 27 



Alnus incana. See Alder. 



Animals, injuries to trees 14 



Apple, slime-flux injury 24 



red heart -rot, susceptibility 37 



white heart-rot, susceptibility •. 26 



Arceuthobium spp., description, propagation, and method of control 16-17 



Ash, leaf-rusts caused by fungi 19 



mistletoe injury 15 



white heart-rot, cause, description, and prevention 46-47 



rot, susceptibility 49 



Aspen, heart -rot, susceptibility 42 



white heart-rot, susceptibility 26, 27, 28, 30, 31, 32, 33, 74 



Atkinson, G. F., reference to work 29 



Bacteria, soil, conditions affecting 13 



Balm of Gilead, white heart -rot, susceptibility 26 



Bark disease, chestnut, cause, ravages, and characteristics 22 



Beech, injury by Fomes fomentarius 50-51, 74 



Xummularia fungi. 22 



sulphur gas and excessive ground water 11, 13 



sap-rot, occurrence 57 



timber, rapid decay 63 



white heart-rot, susceptibility 26, 27, 28, 32, 33, 74 



rot, susceptibility 49 



Betula spp. See Birch. 



Bibliography, forest tree diseases 69-73 



Birch, heart -rot, susceptibility 42, 43 



injury byFomes fomentarius 50-51 



leaf-rust fungus 19 



red heart-rot, cause and description 47 



sap-rot, cause and description 51-52, 74 



caused by Polystictus pergamenus, occurrence 57 



white-rot, susceptibility 49 



yellow, slime-flux injury 24 



white heart-rot, susceptibility 26, 33 



Black gum. See Gum, black. 



jack, susceptibility to sulphur-gas injury 11 



Blight, leaf and twig, sycamore, description, effects, and control 20 



Bordeaux mixture, control of mildews 18 



Borers, locust, preceding fungous growths 45 



oak, preceding fungous growths 41 



Broadleaf poles, posts, trees. See Poles, Posts, Trees. 



149 77 



