History of the Worlds Fair Being a Complete Description of the Worlds Columbi
History of the Worlds Fair Being a Complete Description of the Worlds Columbi
Benjamin Cummings Truman
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One of the interesting class exhibits are lichens, mosses, ferns and other vegetable substances used for bedding and upholstering. Another class of exhibits a z 5 ' '-""tt OS 3 _1 3 o o a O O at z 5 I O Z O s i 8 o = 55 x HISTORY OF THE WORLD'S FAIR. 287 include gums, resins, seeds, fruits, roots, berries and other forest products used in the arts and sciences, or for medicinal and household use. In the department of timber culture and cultivation there are shown trans- plants of various sizes,... seed collections, and methods of seed testing. Implements and machines for preparing the soil and planting trees are also shown. Seed nur- series are illustrated, also the methods of protecting young trees against insects, animals and climate- The section relating to forest management contains in- struments for measuring standing timber and illustrations of the methods used in calculating ages and the effect of certain soils on tree growth. In this section there are interesting exhibits showing the relation of forests to climate and the relative climatic changes produced by destructive and constructive forestry.
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