 The narrow vessels of the summer wood make it richer in wood substance than the spring wood composed of wide vessels. Therefore, rapid-growing specimens with wide rings have more wood substance than slow-growing trees with narrow rings. Since the more...  Bulletin (United States. Division of Forestry) - Էջ 201904Ամբողջությամբ դիտվող - Այս գրքի մասին
 | Raphael Zon - 1904 - 54 էջ
...volume of the tree. The annual rings are very distinct, the springwood containing numerous wide vessels, the summerwood less numerous narrow vessels, scattered...the summerwood make it richer in wood substance than tin springwood, composed of wide vessels. Therefore rapidgrowing specimens with wide rings have more... | |
 | Samuel James Record - 1914 - 192 էջ
...in the narrow rings the spring wood passes into summer wood abruptly. The width of the spring wood changes but little with the width of the annual ring,...of the annual ring is always at the expense of the summer wood. The narrow vessels of the summer wood make it richer in wood substance than the spring... | |
 | Samuel James Record - 1914 - 194 էջ
...in the narrow rings the spring wood passes into summer wood abruptly. The width of the spring wood changes but little with the width of the annual ring,...of the annual ring is always at the expense of the summer wood. The narrow vessels of the summer wood make it richer in wood substance than the spring... | |
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