"The Heavens,", undated Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undated
"The Planet Mars and Saturn in Conjunction" Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909-1910
"The Planets Again" Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909
"The Planets Magnitudes, Masses, etc." Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909
"The Planets One by One" Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909-1910
"The Runge Dinner" Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909-1910
"The Seasons" Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909
"The Tides,", undated Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undated
"The Universe Once More" Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undatedApproximately, 1909-1910
"The Universe,", undated Request Collection Context Columbia University Archives Department of Astronomy records, 1880-1917Series IV: Writings of Harold Jacoby, approximately 1908-1911, undated