. Principles of American forestry . Forests and forestry. FOREST MENSURATION. 191 the distance is more than sixty the shde must be taken out and reversed so that the upper index mark on the slide coincides with the required reading on the left-hand vertical Fig. 64.—Faustman's mirror hypsonieter. A BCD, frame of instrument: E, mirror in which scab is reflected; n, eyepiece; h, cress-wire on which object is sighted; ge, sUde and vertical scale for distance of observer from tree- /, spring to hold slide in place; h, marginal scale which gives height of tree. This instrument may also be u
. Principles of American forestry . Forests and forestry. FOREST MENSURATION. 191 the distance is more than sixty the shde must be taken out and reversed so that the upper index mark on the slide coincides with the required reading on the left-hand vertical Fig. 64.—Faustman's mirror hypsonieter. A BCD, frame of instrument: E, mirror in which scab is reflected; n, eyepiece; h, cress-wire on which object is sighted; ge, sUde and vertical scale for distance of observer from tree- /, spring to hold slide in place; h, marginal scale which gives height of tree. This instrument may also be used in taking levels and grades, and may be mounted on a Jacob's-staff or tripod, but is more often used in the hand. Another instrument, called "Baummesser" by the Germans, mounted on a tripod, is used to take heights, and by means of a stadia attachment, the diameter at any point on the trunk of the tree may also be measured. After some practice with. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Green, Samuel B. (Samuel Bowdlear), 1859-1910. New York, J. Wiley & Sons
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectforestsandforestry