CONTENTS. V 



DISEASES OF PIJLNT8. 



Page. 



Factors affecting susceptibility to disease in plants, I, Spinks , 844 



The sterilization of seed, Massee 844 



Biological and morphological study of a new Aspergillus, Sartory and SyUuw. 844 



Study of a new Penicillium, Sartory 844 



A bacteriosis of Ixia maculata and of Gladiolus colvilli, Severini 844 



The enzymatic activity of two bacteria pathogenic to plants, Severini 845 



Annual report for 1912 of the botanist, Biffen 845 



Report of the Ilohenheim Institute for Plant Protection, 1912, Kirchuer 845 



Field experiments with flag smut. Peacock 845 



On pure cultures of Phytophthora infestans, Pethybridge and Murphy 846 



Use of the green muscadine in the control of some sugar cane pests, Rorer 846 



The stem rot or Hawaiian "iliau" disease of sugar cane, Edgerton 846 



Club root in South Africa, E\'ans 846 



Celery blight, or rust, and its prevention, Sahnon 846 



Lettuce drop, Burger 846 



A disease of tomatoes. Brooks and Price 847 



Tomato diseases, Rolfs 847 



Silver leaf disease, II, Brooks 847 



The Jonathan spot rot. Cook and Martin 847 



Jonathan fruit spot, Norton 848 



Studies on the water core of apple, O'Gara , 848 



Fire blight of pear and apple, Hall '. 848 



The brown rot canker of the peach, Jehle 848 



A leaf disease of papaya, Maubl^ac 848 



Abnormal roots of figa, WoLf 849 



Combating anthracnose, Zacharewicz 849 



Treatments of gray rot of grapes, Thouret and Vidal 849 



Studies on grape diseases in 1912; attacks of black rot, Capus 849 



Studies on grape diseases in 1912 in Gironde, Capus 849 



Studies on grape diseases in 1912 in Au(ie, Capus 849 



Studies on grape diseases, 1912 ; treatment for downy mildew, Capus 849 



Studies on grape diseases, 1912; receptivity to mildew, Capus 849 



An outbreak of mildew, Bailly 850 



Precise data regarding an attack of mildew, Labergerie 850 



Treatments for Oidium of gi-apevines, Thouret and Vidal 850 



Wetting power of fungicidal mixtures, Vermoral and Dantony 850 



A spreading and adherent form of Bordeaux mixture, Chauzit 850 



Prevention and treatment of American gooseberry mildew, Hiltner and Korff . 850 



The Siu-inam witches' broom disease of cacao, Rorer 851 



Coffee disease in East Africa 851 



Resistance of a variety of Helianihus annus to Orobanche cumana, Satsyperov.. 851 



Notes on some diseases of trees in our National Forests, III, Hedgcock 851 



Notes on diseases of trees in the southern Appalachians, I, Graves 851 



Some observations on Polyporus berkeleyi, Weir 852 



Germination studies with spores of Merulius, Wehmer 852 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Officials and organizations for protection of birds and game, 1913, Palmer 852 



The rat, a sanitary menace and an economic burden. Creel 852 



The amended insecticide law, Woodworth 852 



Analyses of insecticides for users. Gray 852 



Powdered arsenate of lead, Morrill 852 



[Insect pests and their control in St. Lucia] 852 



Injurious insects in the Government of Moscow during 1912 852 



rtnsect pests in Java] 852 



[Insects in Sumatra], DeBussy 853 



Garden and truck-crop insect pests, Sanborn 853 



Insect enemies of lentils, Noel. 853 



The enemies of the orach {Atriplex hortensis), Noel 853 



Two enemies of the coconut palm in the Malgasy region, Vuillet 853 



Text-book of forest entomology, Niisslin 853 



Insect enemies of camphor trees, Morstatt 853 



Insect enemies of the osder, Feytaud 853 



OoQtribution to the study of the Thysanoptera oi France, Vuillet 853 



