"Lick Eros Plates,", 1903 Box 5, Folder 13 Columbia University Archives Department of Astronomy records, 1880-1917Series V: Observatory Ledgers and Astronomical Reports, 1896-1917
"Lick Eros Plates," approximately, 1901-1903 Box 5, Folder 10 Columbia University Archives Department of Astronomy records, 1880-1917Series V: Observatory Ledgers and Astronomical Reports, 1896-1917
"Lick Eros Plates," approximately, 1901-1903 Box 5, Folder 11 Columbia University Archives Department of Astronomy records, 1880-1917Series V: Observatory Ledgers and Astronomical Reports, 1896-1917
"Long Haired Stars" Box 4, Folder 16 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909-1910
"Long Range Weather Prediction" Box 4, Folder 10 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1908
"Making Plans" Box 4, Folder 16 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909-1910
"Measuring the Earth by Wireless" Box 4, Folder 10 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1908
"Meteors and Shooting Stars" Box 4, Folder 16 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909-1910
M-N Box 4, Folder 4 Columbia University Archives Department of Astronomy records, 1880-1917Series II: Correspondence of Harold Jacoby, 1888-1913Subseries II.2: Jacoby's Letter File, approximately, 1888-1891
"Moonshine" Box 4, Folder 14 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909