"More Moonshine" Box 4, Folder 14 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909
"Mother Earth,", undated Box 4, Folder 18 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undated
"North Polar Astronomy" Box 4, Folder 15 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909-1910
O-P Box 4, Folder 5 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
"Opening Address to the Summer School of Geodesy, Camp Columbia,", 1908 Box 4, Folder 12 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undated
"Planets, the Wandering Stars" Box 4, Folder 13 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909
"Poesy and Paleo-Zoology" Box 4, Folder 11 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1908
"Precision,", undated Box 4, Folder 18 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undated
"Professor Migrans" Box 4, Folder 11 Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1908
R-S Box 4, Folder 6 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