American Eclipse Expedition to Japan, 1887. Preliminary Report (unofficial) on the Total Solar Eclipse of 1887, by David P. Todd, Director Amherst College Observatory and Astronomer in Charge of the Expedition.David Todd1888
Instructions for observing the total eclipse of the sun, January 1, 1889. By David P. Todd, PH.D., director of Amherst College Observatory.David Todd1888