1917] CONTENTS. V 



Page. 



Opening up the National Forests by road building, IVIenill 547 



The work of the forest department in India, edited by Troup 547 



Sihdculture, Marsden 547 



Relation of storage of seeds of oaks and hickories to germination, Delavan 547 



Evergreen trees for Iowa, MacDonald 548 



The structure and identification of Queensland woods, Jolly 548 



Utilization of ash, Sterrett 548 



Grass trees: An investigation of their economic products, Earl 548 



Note on Indian sumac {Rhus cotinus), Puran Singh 548 



Notes on Funtumia elaalica and Funtumia hybrids, Mlny 548 



Cicatrization of tapping wounds among rubber-yielding plants, Heim 548 



Economic forest . products, Pearson 548 



Marketing woodlot productsin Tennessee, Sterrett 548 



DISEASES OP PLANTS. 



A method for studying the humidity relations of fungi in culture, Stevens. . . . 549 



Celluloid cylinders for inoculation chambers, Hubert 549 



Nematode technique, Magath 549 



Presence of nitrites and ammonia in diseased plants, Boncquet 549 



Influence of Ji^cidmm dematidis on the leaves of its host, Montemartini 549 



Work connected with insect and fungus pests and their control 550 



Reports of laboratory for plant diseases, Linsbauer et al 550 



Some new or rare plant diseases, Montemartini 550 



Phytopathology, Stockdale 550 



Report of the microbiologist, Nicholls 551 



Notes as to Gymnosporangia on Myrica and Comptonia, Dodge and Adams.. 551 



Studies in life histories of some Sepioria occurring on Ribes, Stone 551 



The Uredinales found upon the Onagracese, Bisby 552 



Endophyllum-like rusts of Porto Rico, Olive and Whetzel 552 



The barberry bush and black stem rust of small grains, Melhus and Durrell . . . 552 



Sclerotinia liber Liana on snap beans, McClintock 552 



The Peronospora disease of maize, Rutgers 552 



Flower-bud and boll shedding of cotton in Nigeria, Thornton 553 



Onion mildew, Blin 553 



Some potato problems. Cowan 553 



Cryptogamic diseases of sugar cane, Avema Saccd 553 



Pathology and physiology of tobacco in the Crown lands, Jensen et al 553 



Lanaa disease of tobacco in the Crown lands, Jensen 558 



Gummcsis in tobacco, Jensen 554 



Leaf roil in tomatoes, Giissow 554 



Watermelon diseases, Orton 554 



The varietal relations of crown gall, Shaw 554 



Fire blight, Letoumeau ^ 554 



Dieback of apple trees, caused by Cytospora leucostoma, van der Bij (Byl). 554 



The period of ascospore discharge of the apple scab fungus, Childs 555 



The black knot of plum and cherry, Hutchings 555 



Rougeot of grapevines, Faes 555 



A Pythiacystis on avocado trees, Fawcett 555 



Banana disease on the Salayer Islands, Rijks 556 



Chaxacteristics of citrus canker and of the casual organism, Jehle 556 



Cooperative work for eradicating citrus canker, Kelleiman 556 



Department of citrus canker eradication , Sterling 556 



Citrus scab, Fawcett 556 



Report of the mycologist, Nowell 556 



Dieback disease of Paulownia tomentosa caused by new species of Valsa, Hemmi . 557 



Diseases of woody plants in North Afiica, Maire 557 



Influence of certain climatic factors on Endothia parasitica, Stevens 557 



Influence of temperature on the gi'owth of Endothia parasitica, Stevens 557 



Chestnut blight in West Virginia 558 



Pycnia of Cronartium puriforrae, Boyce 558 



The white pine blister rust in Canada, McCubbin 558 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



The Wyoming ground squii-rel in Colorado with suggestions for control , Burnett . 558 



Destroying rodent pests on the farm, Lantz 558 



Bird life in Washington, Getty 558 



