FOREST BOTANY 275 



Denham, Avon. (5439) 



effects of sheep management on reproduction of western yellow pine 

 and aspen on the range. Colo. Forester 4 : 19-25. 1928. 



Durland, W. D. (5440) 



forest regeneration in porto Rico. Econ. Geogr. 5 (4) : 369-381. 1929. 



Elliott, H. E. (5441) 



WHAT FOLLOWS PULP AND CHEMICAL WOOD CUTTINGS IN NORTHERN PENNSYLVANIA. 



Pa. Dept. Forests and Waters Bull. 43, 7 pp., illus. 1927. 



Frotkingham, E. H. (5442) 



the regeneration of Appalachian hardwood. South. Forestry Cong. Proc. 

 8: 49-55. 192:6. 



Fuller, G. D. (5443) 



reproduction by layering in the black spruce. Bot. Gaz. 55: 452-457, 

 illus. 1913, 



G arm an, E. H. (5444) 



NATURAL REPRODUCTION FOLLOWING FIRES IN CENTRAL BRITISH COLUMBIA. 



Forestry Chron. 5 (3) : 28-44, illus. 1929. 

 Graves, A. H. (5445) 



THE CAUSE OF THE PERSISTENT DEVELOPMENT OF BASAL SHOOTS FROM BLIGHTED 



chestnut trees. Phytopathology 16: 615-621. 1926. 



Graves, H. S. (5446) 



the study of natural reproduction of forests. Forestry Quart. 6 (2) : 

 115-137. 1908. 



Hansen, T. S. (5447) 



second growth on cut-over lands in st. louis county. Minn. Agr. Expt. 

 Sta. Bull. 203, 50 pp., illus. 1923. 



Hardtner, H. E. (5448) 



natural forest replacement. South. Forestry Cong. Proc. 12: 36-39. 1930. 



Harlow, W. M. (5449) 



REPRODUCTION OF ADIRONDACK WHITE CEDAR BY NATURAL CUTTINGS. J0U1\ 



Forestry 26 : 244. 1928. 

 Herbert, P. A. (5450) 



HARDWOOD LANDS AFTER LOGGING : ADEQUATE REPRODUCTION IS SECURED UNDER 

 PRESENT METHODS OF CUTTING IF FIRE IS KEPT OUT. Mich. Agr. Expt. Sta. 



Quart. Bull. 7 (1) : 26-30. 1924. 

 Hill, R. R. (5451) 



EFFECTS OF GRAZING UPON WESTERN YELLOW-PINE REPRODUCTION IN THE NATIONAL 



forests of Arizona and new Mexico. U. S. Dept. Agr. Bull. 580, 27 pp., 

 illus. 1917. 



Hilton, H. C. (5452) 



THE FAILURE OF NORWAY PINE REPRODUCTION UPON THE "PLAINS REGION" OF 



Michigan. Mich. Forester 4: 16-17. 1919. 



Hine, W. R. B. (5453) 



hogs, fire and disease versus long-leaf pine. South. Lumberman 1544: 

 45-46, illus. 1925. 



Hofmann, J. V. (5454) 



THE ESTABLISHMENT OF A DOUGLAS FIR FOREST. Ecology 1 (1) : 49-53, illUS. 



1920. 



— (5455) 



forest perpetuation through natural agencies, Timberman 23 (2) '. 34-35, 

 illus. 1921. 



— (5456) 

 how to obtain a second crop of douglas fir. Timberman 22 (5) : 90-92, illus. 



1921. 



— (5457) 

 natural reforestation through migration. Oreg. Agr. Col., Forestry Club 



Ann. Cruise 3 : 20-27, illus. 1922. 



