IV CONTENTS. [Vol. 37 



Page. 



The influence of commercial fertilizers on bearing apple orchards, Brown 344 



The selection and hybridization of American vines in Italy, Patan^ 344 



Comparative merits of California avocado varieties, Scott 345 



Avocado varieties in Florida, Vosbury 345 



Report on cacao manurial experiments at Djati-Roenggo, Peelen and de Jong. 345 



The culture of citrus plants in Cuba, Cunliffe and van Hermann 345 



A lemon bud variation, Shamel 345 



Maturity standard for Washington navel, Chace 345 



A practical guide to coconut plantin", Munro and Bro-wn 345 



The genus Aanona in the Hawaiian Islands, MacCaughey 345 



Cultivation of the papaya, Cunliffe 345 



South American markets for fresh fruits, Fischer 345 



Making nuts in five years, Littlepage 345 



Gladiolus studies. — III, Varieties of the garden gladiolus, Hottes 345 



The culture of garden roses, Beal 346 



Sweet peas up-to-date, Kerr 346 



Milady's house plants. Palmer 346 



Putnam's garden handbook, Croy 346 



The joyous art of gardening, Duncan 346 



"Know your city trees, Bannwart 346 



FORESTRY. 



Trees worth knowing, Rogers 346 



Bud and twig key to deciduous trees in United States, Sponslcr 346 



The pine trees of the Rocky Mountain region, Sudworth 346 



Note on the forests of Java and Madoera of the Dutch East Indies, Milward . . . 346 



Factors causing variation in yield in Florida camphor tree, Hood 346 



The rubber industry, edited hy Torrey and Mandors 347 



A practical tapping experiment conducted on scientific principles, de Jong. . . 347 



Scientific tapping experiments with Hevea hrasiUnmt, de Jong 347 



Investigations of the quality of plantation rubber 347 



Influence of rubber content of latex on inner qualities of rubber, de Vries. . . . 347 



Influence of amount of acetic acid on inner qualities of rubber, de Varies 347 



Sugar as a coagulant for crepe rubber, de Vries 348 



Reforestation on the National Forests, Tillotson 348 



Nursery practice on the National Forests, Tillotson 348 



Latest devices in protection work, DuBois 348 



Annual report of the National Forest Reservation Commission for 1916 348 



Report of the State forester, Schaaf 348 



First annual report of the State forester, Foster et al 348 



Forest administration of the Central Pro\-inces for 1915-16, Forteath et al 348 



Organization and actiWties of the Chinese forest service, Sherfesee 348 



Timber storage conditions in the Eastern and Southern States, Humphrey 349 



DISEASES OF PLANTS. 



Report of the mycologist. Bunting 349 



Panwitic diseases of cultivated plants, Renacco 349 



Black mold of onions. Van Pelt 349 



Investigations on potato disea.«es (seventh report), Pethybridge 350 



Cork, drought spot, and related diseases of the apple, Mix 350 



Rhizopus rot of strawberries in transit, Stevens and Wilcox 351 



Control of American gooseberry mildew by spraj-ing, Petherbridge and Cole. . . 351 



Mysterious vine disease, Jeffrey 352 



The gray root fungus of Cinchona, Rant 352 



Control of black spot and bro^vn spot in citrus, Darnell-Smith 352 



Composition of citrus leaves at various stages of mottling, Jensen 352 



Relation of nitrogen to mottle-leaf, McBeth 353 



A new species of Endothia, Bruner 353 



Rose diseases, Massey 353 



A disease of Clivia under glass, Amaud 353 



An Altemaria on Sonchus, Elliott 353 



[Cucurbitaria pitfujophila on Scotch pine in Scotland],-M'Intosh 353 



Canker of Scotch pine caused by I)asysq/pha subtilissima, Borthwick and Wilson . 354 



The a^cial stage of Coleosporium ribicola. Long 354 



Dothichiza populca in the United States, Hedgcock and Hunt 354 



