中谷宇吉郎集 第一巻

（１）　Totality begins at 3h. 21m. 58s. and lasts 113 seconds.

（２）　In the case of a cloudy morning note the position of the hour circle for an emergency setting of the coelostat. Take any opportunity given by a break in the clouds of setting the coelostat mirror. Then keep the clock going(but the mirror covered until 3.0 save for an occasional check on the sun's position). The clock runs for 38 minutes after full winding. Give it a final winding at 3.0, see that a long enough run of the sector is available, and finally check the sun's position(with limb at right