136 INDEX TO AMERICAN BOTANICAL LITERATURE 
Schaffner, J. H. New and rare plants added to the Ohio list in 1912. 
Ohio Nat. 13: 36. D 1912. 
Schreiner, O., & Lathrop, E.C. The chemistry of steam-heated soils. 
U.S. Dept. Agr. Bur. Soils. Bull. 89: 5-37. 6N 1912. 
Seckt, H. Céntribucién al conocimiento de la vegetacién del noroeste 
de la Reptiblica Argentina. An. Soc. Cie. Argentina 74: 185-225. 
S 1912. 
Shaw, J.K. Heredity, correlation and variation in garden peas. Ann, 
Rep. Massachusetts Agr. Exp. Sta. 24: 82-101. Ja 1912. 
Shaw, J. K. The effect of fertilizers on variation in corn and beans. 
Am, Nat. 47: 57-64. f. 1, 2. Ja 1913. 
Stockberger, W. W. A literary note on the law of germinal continuity. 
Am. Nat. 47: 123-128. F 1913. 
Smith, C. O. Further proof of the cause and infectiousness of crown 
gall. California Agr. Exp. Sta. Bull. 235: 531-557, f. 1-28. D 
1912. 
Smith, R. E., and others. Walnut culture in California. California 
Agr. Exp. Sta. Bull. 231: 119-398. f. I-96. Au 1912. 
Includes a study of oe walnut organism, Pseudomonas Juglandis Pierce, and 
other diseases of the walnu 
Snow, L. M. Pores and retrogressive changes in the plant 
associations of the Delaware coast. Bot. Gaz. 55: 45-55. f. 1-6. 
15 Ja 1913. 
Stone, G. E. Report of the botanist. Ann. Rep. Massachusetts Agr. 
Exp. Sta. 24: — [3-107.] Ja 1912. [Illust.] 
Includes: Diseases more or less common during the year; Rust on Vinca; Bronzing 
of maple leaves; A notable elm tree; Frost cracks; Some observations on the growth 
of elm trees; The effects of positive and negative electrical charges on seeds and 
seedlings. Reprinted with separate pagination, 
Stone, G. E., & Chapman, G. H. Electrical resistance of trees. Ann. 
Rep. Massachusetts Agr. Exp. Sta. 24: 144-176. f. 1-3. Ja 1912. 
Stone, R. E. The life history of Ascochyta on some leguminous plants. 
Ann. Myc. 10: 564-592. pl. 19, 20. 31D 1912. 
Tidestrom, I. A new Salicornia. Proc. Biol. Soc. Washington 26: 
13, 14. 18 Ja 1913. 
Salicornia utahensis Tidestrom. 
Transeau, E. N. The life history of Gloeotaenium. Bot. Gaz. 53: 
66-73. pl. 3. 15 Ja 1913. 
Visher, S. S. The biology of south-central South Dakota. South 
Dakota Geol. & Biol. Surv. Bull. 5: 61-130. pl. 33-44. Je 1912. 
Weingart, [W.] Cereus laevigatus S.-D. var. guatemalensis Eichlam- 
Monats. Kakteenk. 22: 182-185. 15 D 1912. pans : 
