抄録
In making comparative measurements of a charged body with several types of field-meters, it is interesting to compare the indication made by one type with the indication made by another. Experiments we have made in this regard show that:
(1) The magnitude of an indication is a function of (a) the type of field meter, (b) the figure of the charged body and (c) the charge density.
(2) The magnitude of indication by one type cannot be taken as suggesting the magnitude by indication another type.
(3) There are cases where, although field-meter I indicates 30 KV and meter I1 indicates 1 KV for charged body A, they indicate 3 KV and 20 KV respectively, for charged body B.
Electrification cannot be measured sufficiently with an ordinary field-meter to form a basis for discussion of such phenomena. Sufficient measurement for the purpose can be made, however, with an earthed, large, circular mctal disk attached to the input terminal (inductive electrode of field-meter).
The following article discusses what radial length of disk is needed for measure- ment, what is the element of measurement, what is the indication by a meter, how to design a suitable field-meter and related questions.
