INDEX TO AMERICAN BOTANICAL LITERATURE 399 
Cook, M. T. Development of seed of Linaria vulgaris. Bot. 
Gaz. 77: 225-227. pl. 16. 17 Ap 1924. 
Coons, G. H., & Kotila, J.E. Michigan potato diseases. Mich. 
Agr. Exp. Sta. Spec. Bull. 125: 3-55. f. 1-g9. D 1923. 
Crist, J. W., & Weaver, J. E. Absorption of nutrients from 
subsoil in relation to crop yield. Bot. Gaz. 77: 121-148. 
J. I-09. 17 Ap 1024. 
Cummings, C. E. Nature observations in the Allegany State 
Park. Hobbie 4%: 2-19. Ap 1924. [lllust.] 
Including notes on plants. 
Davidson, J., & Wherry, E. T. Changes in hydrogen-ion con- 
centration produced by growing seedlings in acid solutions. 
Jour. Agr. Research 27: 207-217. 26 Ja 1924. 
Duley, F. L. Easily soluble calcium of the soil in relation to 
acidity and returnsfromlimiag. Soil Sci. 17:213-228. Mr 
1924. 
Farwell, O. A. Notes on the Michigan flora. Part VI. Mich. 
Acad. Sci Papers 3:87—109. The Macmillan Co., New York. 
1924. 
Including descriptions of new varieties and forms. 
Fassett,N.C. An Epilobium under estuarine conditions. Rho- 
dora 26: 48-49. ‘‘Mr’’ 24 Ap 1924. 
Fisher, D. F., & Brooks, C. Control of brown-rot of prunes and 
cherries in the Pacific Northwest. U. S. Dept. Agr. 
Farmers’ Bull. 1410: 1-12. f. 7-12. Mr 1924. 
Floyd, F.G. Proliferation of Asplenium platyneuron (L.) Oakes. 
Am. Fern. Jour. 14: 13-17. ‘Ja-Mr’’ 5 My 1924. 
Fromme, F. D. The rust of cowpeas. Phytopathology 14: 
6e-79. §. 1, 21. ¥. “FE 20° Mr 1924. 
Garber, R. J.,& Wade, B. L. Another instance of defective en- 
dosperm in. maize. Jour. Heredity 15: 69-71. f. 7-8. 
1924. 
Garner, W. W., Bacon, C. W., & Allard, H. A. Photoperiodism 
in relation to hydrogen-ion concentration of the cell sap 
