126 MISC. PUBLICATION 3 64, U. S. DEPT. OP AGRICULTURE 



Pool, R. J. (2492) 



XEROPHYTTSM AND COMPARATIVE LEAF ANATOMY IN EELATION TO TRANSPIRING 



power. Bot. Gaz. 76: 221-240, illus. 1923. 



Preston, J. F., and Phillips, F. J. (2493) 



seasonal variation in the food reserves of trees. Forestry Quart. 9 : 232- 

 243. 1911. 



Rankin, W. H. (2494) 



looking into the heaet of the tree. Natl. Shade Tree Conf. Proc. 6: 

 107-116. 1930. 



(2495) 



penetration of foreign substances introduced into trees. Phytopathology 



7: 5-13. 1917. 



Rudolfs, W. (2496) 



experiments on the value of common rock salt and sulphur for killing 

 live stumps of teees. Soil Sci. 9 (3) : 181-186, illus. 1920. 



(2497) 



INFLUENCE OF SODIUM CHLORID UPON THE PHYSIOLOGICAL CHANGES OF LIVING 



trees. Soil Sci. 8 (5) : 397-425, illus. 1919. 

 Rumbold, C. T. (2498) 



CAUSES FOR THE PRODUCTION OF PATHOLOGICAL XYLEM IN THE INJECTED TRUNKS 



of chestnut trees. Phytopathology 10 : 23-33, illus. 1920. 



(2499) 



effect on chestnuts of substances injected into their trunks. Amer. 



Jour. Bot. 7 (2) : 45-56, illus. 1920. 



. (2500) 



the injection of chemicals into chestnut trees. Amer. Jour. Bot. 7: 



1-20. 1920. 



(2501) 



methods of injecting trees. Phytopathology 5 : 225-228, illus. 1915. 



Saul, Andrew. (2502) 



on propagating trees and shrubs by pieces of the roots. Horticulturist 

 1: 400-401. 1847. 



Schorger, A. W. (2503) 



mannan content of the GYMNOSPERMS. Jour. Forestry 15: 197-202, illus. 

 1917. 



Shaler, N. S. (2504) 



cypress knees, their origin and function. U. S. Geol. Survey Ann. Rept, 

 10 (1) : 322-323, illus. 1890. 



Shattuck, C. H. (2505) 



effect of cyanide of potassium on trees. Science 41 : 324. 1915. 



Shedd, O. M. (2506) 



VARIATIONS IN MINERAL COMPOSITION OF SAP, LEAVES, AND STEMS OF THE WLLD- 



grape vine and sugar-maple tree. Jour. Agr. Research 5 : 529-542. 1915. 

 Shepard, C. U. (2507) 



AN ANALYSIS GIVING THE COMPARISON OF THE MINERAL INGREDIENTS OF INDIAN 

 CORN AND WOOL OF LONG-STAPLE BLACKSEED COTTON, WITH THOSE OF THE 

 LEAVES OF THE COMMON YELLOW OB PITCH PINE AND RED OAK, FROM ST. JOHN'S 

 BERKLEY, NEIGHBORHOOD OF THE SANTEE CANAL, MADE FOR THE BLACK OAK 



agriculture society. 8 pp. Charleston, S. C. 1855. 

 Shull, C. A. (2508) 



THE ROLE OF OXYGEN IN GERMINATION. Bot. GaZ. 57: 64-69. 1914. 



Smyth, B. B. (2509) 



PHYSICAL PROPERTIES OF WATER AND ITS RELATION TO TREE GROWTH (WITH 



tables of microscopic wood structure) . Kans. Acad. Sci. Trans. 19 : 401- 

 424. 1903-4. 



Stowasser, C. E. (2510) 



SOME EFFECTS OF INSERTED SUBSTANCES ON POPLAR TREES. Idaho Forester 12 : 



35-38, 63, illus. 1930. 



