(77) 
Grose, L. R. The alternate hosts of the white pine blister rust. (Am. Forestry XXII 
[1916], p. 469-471, illustr.) 
Guba, E. F. and Anderson, P. J. Phyllosticta härdper and damping off of snap- 
dragons. (Phytopathology IX [1919], p. 315--325, 7 Fig.) 
Güssow, H. T. Leaf roll in tomatoes? (Phytopathology VI [1916], p- 447.) 
— The oceurrence of Colletotrichum cereale, Dothichiza populea and Leptosphaeria 
napi in Canada. (Phytopathology VII [1917], p. 450.) 
— Plant diseases in Canada. (Science 2. ser. XLVI [1917], p. 362.) 
— Establishment of an imperial (British) Bureau of Mycology. (Phytopathology IX 
[1919], p. 265.) 
Gunn, D. The false codling-moth. (Argyroploce leucotrata Meyr.) (Science Bull. 
Union of South Africa Departm. of Agric. Pretoria No. 21 [1921], 28 PP-, ill.) 
Hardenberg, B. B. The Alo& Gall. (Agricult Journ. Union of South Africa Pretoria 
VII [1914], p. 70—72, 1 Fig.) 
Harris, J. A. The application of correlation formulae to the probiem of varietal 
differences in disease resistance: data from the Vermont experiments with potatoes. 
(Amer. Nat. LI [1917], p. 238—244.) 
Harshberger, J. W. A text-book of mycology and plant pathology. (Philadelphia 
1917, I—XIII und 1--779 pp., 270 Fig.) 
Harter, L. L. Sweet-potato diseases. (U. S. Dept. se Farmers Bull. 714 (1916), 
p. 1—26, Fig. 1—25.) Ä 
RE L. L. and Jones, L. R. Cabbage diseases. (U. S. Dept. Agric. Farm. Bull. 
no. 925 [1918], 30 pp., 13 Fig.) 3 
Harter, L. L. and Weimer, J. L. Sweet potato rot and tomato wilt. (Phytopathology 
X [1920], p. 306—307.) 
— Sweet potato diseases. (U. S. Dept. Agric. Farm. Bull. no. 1059 [1919], 24 pp., 
15 Figs.) 5 
>— — Respiration of Sweet Potato storage-Rot Fungi when Grown on a nutrient 
Solution. (Journ. Agric. Research Washington XXI [1921], p- 211—226, 1 Fig.) 
Hartley, Carl and Hahn, G. G. Notes on some diseases of aspen. (PrtOpEtRNIoB > % 
[1920], p. 141-147, 3 Fig.) 
Hartley, C. and Pierce, R. G. ‘The control of damping — off of coniferous seedlings. 
(U. S. Dept. Agric. Bull. 453 [1917], 32 pp., 2 Pls.) 
Hartley, C., Pıerce, R. G. and Hahn, G. G. Moulding of snowsmothered nursery stock. - 
(Phytopathology IX [1919], p. 521531.) 
Hase, Albrecht. Die Schädlingsbekämpfung. (Voss. Ztg. Nr. 43, 2. Beilage gr XL 
19207.) 
— Über die Bekämpfung von tierischen Schädlingen mit giftigen Gasen. Mitt 
; Deutsch. Dendrol. Ges. XXXVI [1921], p. 457—459.) 3 
Haskell, R. J. Ihe spray method of applying concentrated formaldehyde solution 
' in control of oat smut. (Phytopathology VII [1917], p. 381--383.) Be 
— Fusarium wilt of potato. in the Hudson River valley, New York, (Phytopathology 
‚IX [1919], p. 223—260, Pl. XU—XV.) 
Hauman-Merck, L. Les parasites vegetaux des plantes ui an Argentine et 
dans les regions limitrophes. (Anales Mus. Nac. Hist. N sr Aires XXVI 
[1914] 1915, p. 163—225, 6 Fig) 
Hayes, H. K., Parker, John H, and. Kurtzweil, Carl. (ame ab Kant Kesihkanin 
‚Crosses of Varieties of Triticum vulgare with Varieties of T. durum and T. di- 
(Journ. Agric. ‚Research, Washington XIX irre R nz 
F ; Se 
