IV CONTENTS. [Vol. 43 



Page. 



A mutating blackberry-dewbei'ry hybrid, Detjen 4:>S 



Are our raspberries derived from American or liluropean species? Darrow- 439 



Kesults of fig-breeding by I he U. S. Depart uient of Agriculture, Itixford 439 



Some causes of the souring and splitting of fig.s, Condit 439 



Statistics on olive production during the year 1919 439 



Cooperative improvement of citrus varieties, Shamel 439 



Individual tree performance studies with IVIarsh grapefruit, Shamel 439 



Origin of a grapefruit variety having pink-colored fniits, Shamel 440 



Citrus-fruit improvement: Bud variation in Eureka lemon, Shamel et al 440 



Citrus-fruit iuiprovement : Bud variation in Lisbon lemon, Shamel et al 440 



Frost protection in lemon orchards, Shamel et al 440 



Coconut investigations at the College of Agriculture, Espino • 441 



Pecan varieties, grades, standards, and packages. Reed 441 



Sweet peas and antirrhinums : How to grow them, Cuthbertson 441 



Native perennials for the hardy border, V 441 



Flowering trees and shrubs, Sim 441 



Lawn grasses for South China, Graybill 441 



FOEESTRY. 



Cooperation between the Federal Government and the States, Peters 441 



The Tri-State Forestry Conference, Ohio, ll)uii)is, Indiana 441 



Plan of relation of forest regulation to forest c-l)mmunities, Wolff 441 



The open road through the Nation's forests, Cobbs 442 



Recreation in the forests, Carhart 442 



California forests and forestry, Woodbury 442 



[Forestry in Saskatchewan] 442 



The management of Englisli woodlands, Beddoes 442 



Early English forest regulations, Guthrie 442 



Fire protection in Portugal, Woolsey 442 



The forest situation in France, Hall 442 



The rational practice of silviculture, De Fonteny 442 



Silvicultural practice in coppice-under-standard forests, Kittredge 442 



Some silvicultural problems in Pennsylvania, Illick 442 



Decree and instructions relating to Eucalyptus culture 442 



Jack pine, Sterrett 443 



Philippine palms and palm products. Brown and Merrill 443 



Identification of the economic woods of the United States, Record 443 



Seventy-eight Preanger wood species, Beekman 443 



A proposed standardization of the checking of volume tables, Bruce 443 



The height and diameter basis for volume tables, Bruce 443 



DISEASES OF PLANTS. 



The Advisory Board of American Plant Pathologists. Lyman 443 



The differential staining of plant pathogen and host, Dickson 444 



The "iceless refrigerator" as an inoculation chamber. Hunt 444 



The role of bacteria in plant diseases, Doidge 444 



Giant crown galls from the Florida Everglades, Galloway 444 



Piiccinia subnitens and its fecial hosts, II, Bethel 444 



Pucdnia malvaceantni and the mycoplasm theory, Bailey 444 



The chemical composition of Bordeaux mixture, Wober 444 



Mycology and plant pathology [India, 1918-19] 444 



Wheat smuts, with notes on other cereal smuts and ear cockle, Sutton 445 



The microfltira' of normal and of moldy wheat, Morgenthaler 445 



Foot-rot of wheat, Stevens 445 



A disorder of cotton plants in China : Club leaf or Cyrtosis, Cook ,__ 446 



Forms of the hop resistant to mildew, II, Salmon 446 



Failure of lettuce to head, Olney and Valleau 446 



Potato spraying trial [Long Ashton] 447 



Fusarium wilt of potato in the Hudson River Valley, New York, HaskelL 447 



Experiments on land infested with root rot diseases of tobacco, Routt 447 



A disease of tomato and other plants, Pethybridge and Lafferty 447 



Comparison of the late blights of tomato and potato, Giddings and Berg 447 



"Crinkle" on Northwestern Greening, Roberts 448 



Reversion in black currants 448 



