Finally, there was the Principe telescope, which recorded only a handful of stars, from which Eddington heroically derived a reading of 1.61
seconds of arc.
722 (32.5%) subjects had 40-480
seconds of arc at distance, 996 (44.8%) had >480
seconds of arc, and 505 (22.7%) were uncooperative to the test.
The single and double primes (' and ") are the symbols for minutes and
seconds of arc.