258 
AMERICAN JOURNAL OF BOTANY 
[Vol. io. 
21. Hurd, A. M. Seed coat injury and viability of seeds of wheat and barley as factors in 
susceptibility to molds and fungicides. Jour. Agr. Res. 21: 99-122. 1921. 
22. Jones, L. R. Bacterial soft rots of certain vegetables II. Pectinase, the cytolytic 
enzyme produced by Bacillus carotovorus and certain other soft rot organisms. 
Vt. Agr. Exp. Sta. Bull. 147: 281-360. 10 figs. Bibliography, pp. 357-360. 1910. 
23. Jones, L. R., Giddings, N. J., and Lutman, B. F. Investigations of the potato fungus 
Phytophthora infestans. Univ. Vt. and State Agr. Coll. Bull. 168. Pp. 1-100. 
1912. 
24. Kean, A. L. On the nature of certain plant diseases. Bot. Gaz. 15: 171-174. 1890. 
25. Kellerman, K. F. The excretion of cytase by Penicillium pinophilum. U. S. Dept. 
Agr. Bur. Plant Ind. Cir. 118: 29-31. 1913. 
26. McBeth, I. G., and Scales, F. M. The destruction of cellulose by bacteria and fila¬ 
mentous fungi. U. S. Dept. Agr. Bur. Plant Ind. Bull. 266. Pp. 1-50. 2 Pis. 
I 9 I 3 - 
27. Miyoshi, M. Die Durchbohrung von Membranen durch Pilzfaden. Jahrb. Wiss. 
Bot. 28: 269-289. 1895. 
28. Munn, M. T. Neck rot disease of onions. N. Y. Agr. Exp. Sta. Bull. 437: 363-455. 
Pis. 1-11. Bibliography, pp. 450-455. 1917. 
29. Nordhausen, M. I. Beitrage zur Biologie parasitarer Pilze. Jahrb. Wiss. Bot. 33: 
1-46. 1899. 
30. Orton, W. A. Decay of potatoes due to Rhizopus nigricans. Sci., n. ser. 29: 916. 
1909. 
31. Scales, F. M. A method of precipitating cellulose for cellulose agar. Centralbl. Bakt. 
Parasitenk. Infekt. Krankh. 44: 661-663. I 9 I 5 - 
32. Smith, R. E. The parasitism of Botrytis cinerea. Bot. Gaz. 33: 421-436. 1902. 
33. Voges, E. Die Bekampfung des Fusicladium. Zeitschr. Pflanzenkrank. 20: 385- 
393. 1910. 
34. Ward, H. M. A lily-disease. Annals Bot. 2: 319-382. 1888. 
35. Weimer, J. L. Three cedar rust fungi; their life histories and the diseases they produce. 
Cornell Univ. Agr. Exp. Sta. Bull. 390: 507-549. 1917. 
36. Weimer, J. L., and Harter, L. L. Wound-cork formation in the sweet potato. Jour. 
Agr. Res. 21: 637-647. 1921. 
37. Zeller, S. M. Studies in the physiology of the fungi II. Lenzites Saepiaria Fries, 
with special reference to enzyme activity. Ann. Mo. Bot. Gard. 3: 439-512. Pis. 
8, 9. Bibliography, pp. 504-509. 1916. 
