Memoirs of the Kakioka Magnetic Observatory Vol.04 No.02, p.48, September, 1943
A Report of Some Solar Measurements during the Solar Eclipse, of Feb. 5, 2603
Osawa T
Abstract
 On the occasion of the total solar eclipse, a photographic measurement of the time of the end of the eclipse and others are reported. The error of the present photographic method is probably within the limit of two seconds of time.