Discussion
Pfeffer's auxanometer is used for the measurement of:
Answer: A
Pfeffer's auxanometer is used to measure plant growth: it magnifies the small increase in the length of a growing shoot and records it.
The temperature of cooking jelly, the pectin content of a fruit extract and the tenderness of peas are measured by other instruments (a thermometer, a pectinometer and a tenderometer).
An auxanometer records growth in length by means of a thread that passes over a pulley to a pointer. Pfeffer's version magnifies the growth of the plant on a scale, which gives the rate of growth.
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