Old Guard
The AAVSOs "Old Guard"
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From the beginning, the number of observations being sent to the AAVSO each year began to rise dramatically: from 4,900 in 1911; to 11,600 in 1912; 16,800 in 1914; 17,400 in 1917; 19,300 in 1921; and 26,900 in 1924. |