CONTENTS. V 



Page. 



Causes of natural change in the latex of Hevea hrasiliensis, WTiitby 14y 



Chemical treatment of waste wood, Benson 149 



DISEASES OF PLANTS. 



The fundamentals of general phytopathology, Klebahn 150 



Diseases of agricultural crops, Legault 150 



Some important plant diseases of Oregon, Jackson, Barss, and Bailey 150 



Plant protection, Stebler 150 



Injury to soil by noxious substances produced by fungus parasites, Pantanelli. . 150 



Control of stalk nematodes ( Tylenchus devastatrix) , Van Luijk 151 



Sensitiveness of cereals to fungicidal treatment in 1912, Miiller and Molz 151 



Dry spot of oats, Clausen 151 



Dry spot of oats, Kruger and Wimmer 151 



Premature death of wheat, Grosser 151 



Susceptibility of wheat to stinking smut and time of seeding, Munerati 151 



Smut experiments 152 



A root disease of Paspalum dilatatum 152 



A hitherto but little recognized potato disease {Hypochnus solani), Eriksson. . . 152 



Infection experiments with Fhytophthora infestans, Garbowski 153 



Pests and diseases of sugar beets, 1912, Fallada 153 



Root tumors, Stift 153 



A dry rot of sweet potatoes caused by Diaporthe batatatis, Harter and Field 153 



Apple tree anthracnose, Jackson 153 



The "rough-bark " disease of the Yellow Newtown apple, Roberts 154 



Sooty blotch on apples, McClintock 154 



Cherry gummosis, Barss 154 



Pear rust {Gyninosporangium, sabinx), Scheibener 155 



The black knot of plums, Coons 155 



The germination of the winter spores of gra.pe downy mildew, Ravaz and V^erge . 155 



Some investigations on the development and treatment of downy mildew, Faes. 155 



Diseases of cacao and means for their control, Martinez 155 



Canker of oleander, Tonelli 156 



The supposed European origin of the American chestnut canker, Pantanelli.. 156 



Studies on black canker of chestnut trees, Petri 156 



A leaf spot of Eucalyptus pulvendeata 156 



Drying of larch needles due to Cladosporium laricis and Meria laricis, Fiori 156 



Micro-organisms of maple sap. — III, Descriptions, Edson and Carpenter 157 



Fruiting bodies of dry rot fungus, Havellk 157 



Recent observations on dry rot, Havelik 157 



The wetting power of fungicides, Fonzes-Diacon 157 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Index zoologicus, II, Waterhouse, edited by Sharp 157 



Plague eradication in Porto Rico, Creel '. 153 



[Report of] department of entomology, Doten 158 



Report of department of entomology, Doten 158 



Report of the department of entomology 158 



Check list of California insects, IV, Woodworth 158 



Host index to California Coccidae, Baker and Essig 158 



The grape leafhopper , Quayle 158 



A few facts concerning the fruit flies of the world, Compere 158 



Observations on the life history of a new species of Psychoda, Welch 159 



Stomoon/s calciirans, Brain 159 



Wistaria gall fly (Agromyza schineri) , Amundsen 159 



Psoroptes communis oris. — Ova and ovipositing. Stockman and Berry 159 



POODS — HUMAN NUTRITION, 



Mutton and its value in the diet, Langworthy and Hunt 159 



Natural immunity in the development of fertile hens' eggs, Ruzifika 159 



The influence of cooking on the physico-chemical behavior of milk, Grosrer. . . 160 



Differences between graham and imitation graham flours, LeClerc and Jacobs. . 160 



The manufacture of a sweet flour from the sugar beet, Aulard 161 



