158 MISC. PUBLICATION 3 64, U. S. DEPT. OF AGRICULTURE 

 Wahlenberg, W. C. (3117) 



MODIFICATION OF WESTERN YELLOW PINE ROOT SYSTEMS BY FERTILIZING THE SOIL 



at different depths in the NURSERY. Jour. Agr. Research 39 1 137-146, 

 illus. 1929. 



Waterman, W. G. (3118) 



DEVELOPMENT OF ROOT SYSTEMS UNDER DUNE CONDITIONS. Bot. GaZ. 68 : 22-53, 



illus. 1919. 



Weaver, J. E. (3119) 



the ecological relations of roots, 128 pp., illus. Washington, D. C. 

 1919. (Carnegie Inst. Wash. Pub. 286.) 



(3120) 



ecology of boot systems. Carnegie Inst. Wash. Yearbook 17: 291-292. 



1918. 



— (3121) 



root development in the grassland formation. Carnegie Inst. Pub. 292 : 

 28-32, 38-41. 1920. 



White, T. G. (3122) 



mechanical elevation of the roots of trees. Asa Gray Bull. 5 : 2-4, illus. 



1897. 



STEM GROWTH 

 Behre, C. E. (3123) 



notes on the oause of eccentric growth in trees. Jour. Forestry 23 : 

 504-507, illus. 1925. 



Bogue, E. E. (3124) 



annual rings of tree growth. U. S. Monthly Weather Rev. 33 : 250-251. 

 1905. 



Brenke, Bernice, and Hanson, H. C. (3125) 



SEASONAL DEVELOPMENT OF GROWTH LAYERS IN FRAxINUS CAMPESTRIS AND ACER 



sacoharinum: Bot. Gaz. 82 : 2S6-305, illus. 1926. 



Craighead, F. C, and Munns, E. N. (3126) 



abnormalities in annual rings resulting from fires. Jour. Forestry 25: 

 840-842, illus. 1927. 



Dachnowski, A. (3127) 



type and variability in the annual wood increment OF ACER RUBRUM. 

 Ohio Nat. 8 (7) : 343-349, illus. 1908, 



Fernow, B. E. (3128) 



age and growth. Pacific Coast Wood and Iron 37 (1) : 17. 1902. 



(3129) 



ring growth of trees. U. S. Dept. Agr., Div. Forestry Ann. Rept. 1887: 



39-40. 1888. 



Grossenbacher, J. G. (3130) 



the periodicity and distribution of radial growth in trees and their 

 relation to the development of "annual" rings. Wis. Acad. Sci., Arts, 

 and Letters, Trans. 18 (1) : 1-77. 1915. 



Higgs, L. S. (3131) 



method of taking impressions of year-rings in conifers. Forestry Quart. 

 10: 1-2. 1912. 



MacDougal, D. T. (3132) 



growth in trees. 41 pp., illus. Washington, D. C 1921. (Carnegie Inst. 

 Wash. Pub. 307.) 



(3133) 



tree trunks, growth and reversible variations in circumference. Science 

 61: 370^372. 1925. 



Meehan, Thomas. (3134) 



on the period and ratio of the annual increase in the circumference of 

 trees. Acad. Nat. Sci. Phila. Proc. 18 : 292-293. 1866. 



