IV 
Journal of Agricultural Research 
voi/xiv 
Susceptibility and Resistance to Citrus-Canker of the Wild Rela- Page 
tives, Citrus Fruits, and Hybrids of the Genus Citrus. George 
L. Pettier. 337 
Variation and Correlation in Wheat, with Special Reference to 
Weight of Seeds Planted. A. C. Arny and R. J. Garber. 359 
Obtaining Beet Leafhoppers Nonvirulent as to Curly-Top. C. F. 
Stahl and Eubanks Carsner. 393 
Acidity of Silage Made from Forage Crops. Ray E. Neidig. 395 
Pinon Blister-Rust. George G. Hedgcock, Ellsworth 
Bethel, and N. Rex Hunt. 411 
Comparative Toxicity of Cottonseed Products. W. A. Withers 
and F. E. Carruth.. 425 
Variations in the Moisture Content of the Surface Foot of a Loess 
Soil as Related to the Hydroscopic Coefficient. Frederick J. 
Alway and Guy R. McDole.. 453 
Subsoiling, Deep Tilling, and Soil Dynamiting in the Great Plains. 
E. C. Chilcott and John S. Code. ... 481 
Overwintering of the Citrus-Canker Organism in the Bark Tissue 
of Hardy Citrus Hybrids. George L. Peltier and David C. 
Neal. 523 
Resistance of Seeds to Desiccation. George T. Harrington 
and William Crocker. 525 
Occurrence of Coccidioidal Granuloma (Oidiomycosis) in Cattle. 
L. T. Giutner. 533 
Tissue Invasion by Plasmodiophora brassicae. L. O. KunkEL .... 543 
An Improved Method for Recovering Trypanosomes from the 
Blood of Rats for Antigen Purposes in Connection with Com¬ 
plement Fixation. F. H. Reynolds and H. W. Schoening. . 573 
Life History of Pemphigus populi-transversus. Thomas H. 
Jones and C. P. Gillette .. 577 
Stem Lesions Caused by Excessive Heat. Carl Hartley. 595 
Work and Parasitism of the Mediterranean Fruit Fly in Hawaii 
during 1917. C. E. Pemberton and H. F. Willard. .. 605 
Com-Rootrot and Wheatscab. G. N. Hoffer, A. G. Johnson, 
and D. Atanasoff. 611 
Index. 613 
ERRATA 
Page 60, legend to Plate A, line 4, “tugidity ” should read “turgidity.” 
Page 62, Table I. column 6, line 3. under “Per cent,” “48.3" should read “4 83/' 
Page 72, line 14, “standards deviations’* should read “standard deviations.” 
Page 137, Table II, column 4, line 3, “ 69 ” should read “59 " 
Page 207, paragraph 3, line 10, “the specimens” should read “other specimens.” 
Page 252, legend to Plate 33, D, “ X90’ * should read “ Xi.ooo. ’’ 
Page 340, line 30, “Murreaa” should read “Murrea.” 
Page 358, Plates 50-51. the plate numbers should be interchanged. 
Pages 373-376 (Tables iv-xi) and pages 381-384 (Tables xiv-xxi), the headings for the abscissae and the 
<ordinates should be interchanged. 
Page 6io, lines 9 and 10, “This was the only point at which O. humilis had been established when the 
collections were made” should read “At this point only O, humilis had been established when the collec¬ 
tions were made.’* 
Page 611, lines 15 and 28, “Gibberella spp.” should read “Gibberella sp.” 
