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Old Guard

The AAVSOs "Old Guard"

 

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.

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484