クロノメーター取扱に関する一実験(日本航海学会第16回講演会)

抄録

It is well known that the gratest care must be taken of the treatment of the chronomter. As an experiment of the case where the chronometer is treated most carelessly, we tested several times what effect would be produced on the daily rate immediately after the day on which the winding was forgotten full one day. From the results of our experiment and the reference materials offered by Kobe Marine Meteorological Observatory, the following points were clarified. (i) The daily rate which appears on the day following the day when the winding is forgotten is always larger than the mean of the common daily rates in the absolute value, and takes the same sign with the latter. (ii) The value of the daily rate which appears on the day following the day when the winding is forgotten is almost constant on each chronometer, but considering generally, this value cannot be estimated before the winding is forgotten, becsuse the ratio of this value to that of the mean of the common daily rates is unsettled. (iii) Excepting the chronometer having especially high efficiency, the effect of the forgetting to wind upon the daily rate may extend not only to the next day but also to the following few days ; The fluctuation of the daily rates which appear on the following few days, however, is comparatively small and not worthy of notice.