Forest Development in the Adirondacks 47 
12. This and similar studies have a value in respect to the 
elaboration of a forest policy in that they show not merely the 
general tendency of our vegetation development to culminate 
in forest but especially how closely this development is asso- 
ciated with conditions of soil, drainage, ete., 1. e. with edaphic 
as contrasted with climatic conditions. Any forest policy based 
on natural regeneration of the forest must have in mind the 
limitations which edaphic conditions impose upon the rapidity 
and end result of such natural reforestation. 
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(1} Bergman, H. F., and Stallard, Harvey. The development of climax 
formations in northern Minnesota. Minnesota Bot. Studies. 4: 333-378. 
Pell 1G. 
(2) Bray, William L. The development of the vegetation of New York 
State. New York State College of Forestry, Tech. Pub. No. 3, pp. 1-186. 
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(3) Clements, F. E. Plant succession. Carnegie Inst. Wash. Pub. No. 
242, 
(4) Cooper, William S. Reproduction by layering among conifers. 
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(5) — —. The climax forest of Isle Royale, Lake Superior, 
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map. 1913. 
(6) Cox, H. J. Frost and temperature conditions in the cranberry 
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Series. 1912. 
(8) Fuller, Geo. D. Reproduction by layering in the black spruce. 
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(9) Harshberger, J. W. American heaths and pine heaths. Mem. 
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(10) Nichols, Geo. E. ‘The interpretation and application of certain 
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Plant World 20: 305-309, 341-353. 1917. 
(11) The flora of northern Cape Breton Island, Nova Scotia. Trans. 
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(12) Peck, C. H. 47th Rep. N. Y.S. Mus. pp. 133-4, 1894. 
(13) Rieg. Geo. B. A summary of bog theories. Plant World 19: 
310-325. 1916. 
(14) ————— ——_——_-._ Forest succession and rate of growth in 
sphagnum bogs. 15: 726-739. 1917. See also ‘Bot. Gaz. 65: 359-362. 
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(15) . Colloidal properties of bog water. Bot. Gaz. 
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(16) Rowlee, W. W. — Relation of marl ponds and peat bogs. Mem. 
Brooklyn Bot. Gard. 1: 410-414. f. 1-3. 1918. 
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Stallard, Harvey and Bergman, H. F. See (1). 
