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Describe the experiment to measure the i...

Describe the experiment to measure the increase in length of the stem tip using an arc auxanometer.

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The increase in the length of the stem tip can easily be measured by an arc auxanometer which consists of a small pulley to the axis of which is attached a long pointer sliding over a graduated are. A thread one end of which is tied to the step tp and another end to a weight passes over the pulley tightly . As soon as the stem tip increases in length, the pulley moves and the pointer slide over the greaduated arc (Figure). The reading is taken. The actual increase in the length of the stem is then calculated by knowing the length of the pointer and the radius of the pulley. If the radius of the pulley is 4 inches and the length of pointer 20 inches the actual growth is measured as follows:
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