Slipher, V. M., V. M. Slipher to Edwin Hubble, March 29, 1924, on contacting Dr. Curtis to discuss bibliography, 1924-03-29
Slipher suggests Hubble contact Dr. Curtis to discuss the bibliography research Hubble has been conducting and briefly describes Curtis, including his…
Hubble, Edwin, Edwin Hubble to V. M. Slipher, February 9, 1924, on unclassified nebulae and institutional establishment, 1924-02-09
Hubble sent Slipher a memorandum with the letter to pass on to the Committee on Nebulae at the International Astronomy Union, regarding a proposal for…