124 MISC. PUBLICATION 3 64, IT. S. DEPT. OF AGRICULTURE 



Harvey, R. B. (2451) 



red as a protective color in vegetation. Jour. Forestry 23 : 179-180. 1925. 



Herbert, P. A. (2452) 



poisoning green timber. Mich. Agr t Expt. Sta. Quart. Bull. 6 (2) : 60-61. 

 1923. 



Hicks, P. A. (2453) 



chemistry of growth as represented by carbon nitrogen ratio: regenera- 

 tion op willow cuttings. Bot. Gaz. 86: 193-209, illus. 1928. 



Horton, R. E. (2454) 



transpiration by forest trees. U. S. Monthlv Weather Rev. 51 (11) : 

 571-581. 1923. 



Korstian, C. F. (2455) 



DENSITY OF CELL SAP IN RELATION TO ENVIRONMENTAL CONDITION IN THE 



wasatch mountains of utah. Jour. Agr. Research 28 : 845-907. 1924. 



(2456) 



EVAPORATION AND SOIL MOISTURE IN RELATION TO FOREST PLANTING. Utah 



Acad. Sci. Trans. 2: 116-117. 1921. 

 , Hartley, C, Watts, L. F., and Hahn, G. G. (2457) 



A CHLOROSIS OF CONIFERS CORRECTED BY SPRAYING WITH FERROUS SULPHATE. 



Jour. Agr. Research 21: 153-171. 1921. 

 Larsen, J. A. (2458) 



RELATION OF LEAF-STRUCTURE OF CONIFERS TO LIGHT AND MOISTURE. Ecology 



8: 371-377, illus. 1927. 

 Livingston, B. E., and Hawkins, A. L. (2459) 



THE WATER RELATIONS BETWEEN PLANT AND SOIL. 48 pp. Washington, D. C. 



1915. (Carnegie Inst. Wash. Pub. 204.) 

 Lodewick, J. E. (2460) 



SEASONAL ACTIVITY OF THE CAMBIUM IN SOME NORTHEASTERN TREES. N. Y. 



State Col. Forestry, Syracuse Univ., Tech. Pub. 23, 87 pp., illus. 1928. 

 Luxford, R. F. (2461) 



DISTRIBUTION AND AMOUNT OF MOISTURE IN VIRGIN REDWOOD TREES. JOUI". 



Forestry 28: 770-772, illus. 1930. 



Lyon, H., and Merwin, H. E. (2462) 



sap pressure in the birch stem. Bot. Gaz. 48: 442-458. 1909. 



Lyon, T. L., and Wilson, J. K. (2463) 



LIBERATION OF ORGANIC MATTER BY ROOTS OF GROWING PLANTS. Cornell Univ. 



Agr. Expt. Sta. Mem. 40, 44 pp., illus. 1921 

 McClenahan, F. M. (2464) 



THE DEVELOPMENT OF FAT IN THE BLACK WALNUT. Jour. Amer. Chem. SOC. 



31 (9) : 1093-1098. 1909. 



• (2465) 



THE DEVELOPMENT OF FAT IN THE BLACK WALNUT. Jour Amer. Chem. SOC. 



35 (4) : 485-493, illus. 1913. 

 MacDougal, D. T. (2466) 



ABSORPTION AND EXUDATION PRESSURES OF SAP IN PLANTS. Amer. Phil. SOC. 



Proc 64 (2) : 102-130, illus. 1925. 



(2467) 



the hydrostatic system of trees. 125 pp., illus. Washington, D. C 1926. 

 (Carnegie Inst. Wash. Pub. 373.) 



■ (2468) 



REVERSIBLE VARIATIONS IN VOLUME, PRESSURE, AND MOVEMENTS OF SAP IN TREES. 



90 pp., illus. Washington, D. C 1925. (Carnegie Inst. Wash. Pub 365.) 



, and Overton, J. B. (2469) 



sap flow and pressure in trees. Science 65 : 189-190. 1927. 



, Overton, J. B., and Smith, G. M. (2470) 



THE HYDROSTATIC-PNEUMATIC SYSTEM OF CERTAIN TREES : MOVEMENTS OF LIQUIDS 



and gases. 99 pp., illus. Washington, D. C 1929. (Carnegie Inst. Wash. 

 Pub. 397.) 



