抄録
In the present report, some themes are examined from statistical standpoint by using the reading data obtained through precise gravity survey in Miura Peninsula, and the following results are noticeable.Those are:1. Five successive readings at each station are unnecessary under the circumstances of other influential disturbing factors.2. Irregularities in instrumental drift do not seem to affect the result. The fact that similar drift patterns are sometimes appeared in different instruments, suggests common causes of drift. 3. It is rather difficult to keep the measuring accuracy within 1/100 mgal always by increasing the numbers of instruments used.4. Systematic deviations of results of respective instrument from mean values are the most serious problem. Without finding the way to minimize these deviations, the improvement of measuring accuracy is difficult. Similar patterns of deviations which often appear in different gravimeters like the case of drift would be a key of solving this problem.
