Forest Leaves Volume 7, No. 69 - V. 10, No. 116

Forest Leaves Volume 7, No. 69 - V. 10, No. 116

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1899 edition. Excerpt: ...of Maine... 9 The Eucalyptus on the Roman Campagnm. 9 Birds and Trees................................ n Withdrawal of Forested Public Lands Recommended n Uses of Persimmon _Iuice.. 13 New Publications............... 13 I Philadelphia, February, 1oo3. No. 1. Published Bi-Monthly by the PENNSYLVANIA FORESTRY ASSOCIATION, ion Walnut St., Philadelphia, Pa. Entered at the Philadelphia Post-Ofice as second class matter. EDITORIALS. HE readers of l'oRi;s'r I.F.Avi-is will be interT ested in the plea of Dr. Rothrock for the water-powers of the State, which appears in another column under the caption " Our Wan ing Vater-Power. " That a forest cover has a steadying influence upon the flow of streams is proven in numerous instances. It has been our privilege lately to discuss this subject with a gentleman who has at command precipitation and run-ofi' records of a number of streams on the western slope of the Allegheny Mountains, in Pennsylvania. 'l'wo of these offer excellent opportunity for tomparison, because they are at about the same elevation above sealevel and drain neighboring areas with similar topographical and geological features. Stream "A" has a watershed of approximately half that of stream " B;" but about 8o per cent. of the area drained by s_tream " A " is forest, while not 50 per cent. of that drained by stream " B " has forest cover. The average annual run-off per square mile of stream " A " is 25 per cent. greater than the flow per square mile from the drainage-basin of stream " B' 11 But the minimum discharge per square mile of stream " A" is four times that of stream " B." This is based upon contemporaneous records for an entire...show more

Product details

  • Paperback | 242 pages
  • 189 x 246 x 13mm | 440g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236501888
  • 9781236501882