Table I.
Errors of the Time Ball in 1909.
~ means too late.
+ means too early.
Date. January February March April May June July August Sept. October Nov. Dec. 1 ~~~ 0.1 +1.1 -0.3 0.1 +0.2 -0.2 0.1 0.1 0.1 0.1 2 0.1 +0.4 -0.3 +0.2 0.1 0.1 0.1 0.1 0.1 3 0.1 +0.3 0.1 -0.3 +0.4 0.1 0.1 -0.2 0.1 0.1 4 +0.2 0.1 +0.3 0.1 +0.4 0.1 0.1 +0.2 -0.2 0.1 5 +0.3 +0.2 0.1 0.1 0.1 0.1 -0.2 0.1 +0.2 -0.2 6 +0.4 0.1 0.1 0.1 0.1 0.1 0.1 +0.2 +0.2 -0.3 7 +0.4 0.1 0.1 -0.3 0.1 +0.4 0.1 0.1 8 +0.5 -0.3 +0.2 0.1 0.1 -0.2 0.1 0.1 0.1 9 +0.3 -0.2 +0.2 +0.3 0.1 +0.7 +0.2 -0.3 0.1 0.1 10 ... -0.3 +0.3 +0.2 0.1 +0.2 +0.4 +0.3 0.1 +0.2 11 +0.5 -0.3 +0.3 0.1 +0.2 +0.4 +0.2 -0.6 +0.2 0.1 12 +0.4 -0.4 +0.3 0.1 0.1 +0.4 +0.3 -0.2 +0.3 13 0.1 0.1 +0.3 +0.2 0.1 +0.6 +0.4 0.1 0.1 0.1 0.1 14 -0.2 0.1 -0.2 -0.3 +0.4 +0.3 0.1 15 -0.3 0.1 0.1 0.1 0.1 -0.2 -0.2 +0.9 +0.2 +0.2 0.1 16 -0.4 0.1 -0.2 0.1 +0.2 +0.3 0.1 +0.2 +0.2 0.1 0.1-E 5