. Forestry. FIG. 25 to the staff and to the tree, the height can be obtained by theformula— ba X DC H = D. Faustmanns Hypsometet\ or height measurer, is shown inFig. 26. With it a trees height can be ascertained fromany convenient position from the stem, provided one can seefrom it both the top and the base of the tree. The distancefrom the observer to the base of the tree is measured, and thevertical scale {g, e) is adjusted accordingly. Then, sightingthrough a and b to the tree top, the pendulum (S), with theplumb-line resting on the horizontal scale, gives the heightplus or minus the differ
. Forestry. FIG. 25 to the staff and to the tree, the height can be obtained by theformula— ba X DC H = D. Faustmanns Hypsometet\ or height measurer, is shown inFig. 26. With it a trees height can be ascertained fromany convenient position from the stem, provided one can seefrom it both the top and the base of the tree. The distancefrom the observer to the base of the tree is measured, and thevertical scale {g, e) is adjusted accordingly. Then, sightingthrough a and b to the tree top, the pendulum (S), with theplumb-line resting on the horizontal scale, gives the heightplus or minus the difference in level between the eye of theobserver and the foot of the tree. This latter point isquickly decided by sighting to the trees base, and adding orsubtracting according as the result indicates. FORESTRY.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectforestsandforestry
