Question

Crescograph and auxanometer are_____.

Answer 1

Crescograph:

1. It is a device that is used to measure the growth of plants.
2. It was invented by Sir Jagadish Chandra Bose, an Indian botanist.
3. The two important things that are used in the instrument are a smoked glass plate and the number of clockwise gears.
4. The plate has regular markings and the clockwise gear is used to measure the growth that gets influenced by different conditions.

Auxanometer:

1. It is a device that is used to measure growth in the length of the plant.
2. It is of two types namely arc auxanometer and Pfeffer's auxanometer.
3. Arc auxanometer measures the growth in length of the stem tip.
4. It has a curved graduated scale, a pulley with a groove, and a pointer that moves on a scale.
5. The Pfeffer's auxanometer consists of two wheels, one small and one large wheel.

Final answer: Crescograph and auxanometer are devices that are used to measure the growth in the length of a plant.