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When a tree stands so that the length of its shadow can bo measured, its height may be readily ascertained as follows :—Set a stick upright. let it be perpennicular by the plumb line. Measure the length of the shadow of the stick. As the length of the shadow is to the height of the stick, so is the length of the shadow of the tree to its height. For instance, if the stick is four feet above the ground, and its shadow is six feet in length, and the shadow of the tree is ninety feet, Lho height of the tree will be sixty feet (6:4: 90 :i6O). In other words, multiply the length of the shadow of the tree by the height of the stick, and divide by tht shadow of the stick.

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https://paperspast.natlib.govt.nz/newspapers/SOCR19070105.2.32

Bibliographic details

Southern Cross, Southern Cross, Volume 14, Issue 45, 5 January 1907

Word Count
135

Southern Cross Southern Cross, Volume 14, Issue 45, 5 January 1907

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