Hill: Penobscot Vegetation 437 



tribution, with notes on the more interesting species. 

 Trans. Roy. Soc. Canada 4: 3-20. 1894. 



18. Moore, B. Reproduction in the coniferous forests of 

 northern New England. Bot. Gaz. 64: 149-158. 

 1917. 



19- . Some factors influencing the repro- 

 duction of red spruce, balsam fir and white pine. Jour. 

 For. 15: 827-853. 1917. 



20. Murphy, L. J. The red spruce: its growth and man- 



agement. U. S. Dept. Agr. Bull. 544. pp. 1-100. 

 pi. 1-7. 1917. 



21. Nichols, G. E. The vegetation of Connecticut. II. 



Virgin Forests. Torreya 13: 199-215. f. 1-5. 

 1913. 



22. . A working basis for the ecological 



classification of plant communities. Ecology 4: 11- 

 23, 154-179. 1923. 



23. — . The vegetation of northern Cape 

 Breton Island, Nova Scotia. Trans. Conn. Acad. 

 Arts and Sci. 22: 249-467. f. 1-70. 1918. 



24. — . Raised bogs in eastern Maine 

 Geog. Review 7: 159-167. f. 1-2. 1919. 



25. Norton, A. H. Some noteworthy plants from the is- 



lands and coast of Maine. Rhodora 15: 137-143. 

 1913. 



26. Shaler, X. S. Recent changes of level on the coast 



of Maine. Mem. Boston Soc. Xat. Hist. 2: 321- 

 340. 1874. 



27. Toumey, J. W. The relation of gray birch to the re- 



generation of white pine. Jour. For. 17: 15-20. 

 1919. 



