MEASURING TREES
Tree heights are often the subject of discussion. Any doubts about height can be readily solved by measuring. There are innumerable accurate but often expensive 'instruments on the market for measuring trees. They are called hypsometers or dendrometers. But a walking stick or ruler may be made to serve the same purpose. If a walking stick is chosen, a length of say three feet from the end is measured off and marked by a notch. A second length of say three inches is also marked. The observer holds the stick in front of his.eyes that he looks through the three-foot notch to the top of the tree, and through the base of the stick to the base of the tree. A third line of vision is now taken through the three-inch notch to the tree trunk and the point where it meets the trunk is carefully noted or marked and its height measured. This height multiplied by 12 will give the height of the tree. Other methods, equally simple, introducing the principles of similar triangles or the measurement of angles suggest themselves.
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Wairarapa Times-Age, 4 May 1939, Page 2
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184MEASURING TREES Wairarapa Times-Age, 4 May 1939, Page 2
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