SUMMARY.
In the Method of Balance the movement of growth upwards is compensated by an equal movement of the plant downwards, with the result that the record remains horizontal.
The effect of an external agent is immediately detected by the upsetting of the balance, up-record representing acceleration above normal, a down-record the opposite effect of depression below the normal rate.
The latent period and the after-effect of stimulus may thus be obtained with the highest accuracy.
The sensitiveness of the Method of Balance may be raised so as to indicate a variation of rate of growth smaller than 1⁄1000 millionth of an inch per second.
[1] "Plant Response"—p. 413.