File:Western field (1905) (14756654686).jpg

Identifier: westernfield61905olym (find matches)
Title: Western field
Year: 1902 (1900s)
Authors: Olympic Club (San Francisco, Calif.) California Game and Fish Protective Associations
Subjects: Olympic Club (San Francisco, Calif.) California Game and Fish Protectice Associations Sports
Publisher: San Francisco
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

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notice that the oppositesides of a hill are clothed with a differentspecies of forest. This circumstance, is inmost cases due to the fact that one of thespecies requires the coolness and moistureof a northern slope, while the other has theinborn qualities to resist the fierce middayheat of summer and the early and late frostsof other seasons of the year. A fact alsoin this connection may be noted in passing,to wit, that the frosts of late spring andearly fall are much more apt to kill theblossoms, twigs and young trees on an east-ern slope where the sun strikes early in theday than those of northern and westernslopes where rapid thawin-, which doesmore harm than freezing, is not so likely tooccur, and where the annual growth beginslater in the spring. Heat and moisture act in unison uponplant life, and their exact effects are some-times manifested in such a way as to presenta considerable problem to the student of sil-viculture. But it is quite apparent that 452 WESTERN BlELD
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moisture has almost as great and direct aninfluence on the distribution of trees overthe earth as heat itself. Within any given region of forest growthihis peculiarity of trees is quite conspicuous.The smaller the space the more noticeablethe effect, because the contrast is more strik-ing. In many instances the distribution isentirely controlled by the demand for water.The opposite sides of a range of mountainsmay be covered with a distinctly differentgrowth of trees. On the eastern slope of theCascades, for example, are seen the stuntedbull-pine groves at more or less irregularintervals, because the rainfall in this regionis uncertain and frequently very slight,while upon the western slope, where therains are copious and abundant, stands theheaviest and most valuable body of denseand towering forest of merchantable treesupon the American continent, composedchiefly of northern cedar, red fir and westernspruce. And even more striking is the con-trast of the two slopes of the Sierra Ne-

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