[10] “Cordoba Durchmusterung” by J. Thome. Results of the National Argentine Observatory, vol. 16, 17, 18, 21 (1894-1914).
[11] Aph. J., vol. 36.
[12] H. A., vol. 71.
[13] H. A., vol. 91, 92, 93, 94.
[14] A catalogue of radial velocities has this year been published by J. Voute, embracing 2071 stars. “First catalogue of radial velocities”, by J. Voute. Weltevreden, 1920.
[15] Compare Adams' memoirs in the Contributions from Mount Wilson.
[16] The first line gives the stars of an absolute magnitude between -4.9 and -4.0, the second those between -3.9 and -3.0, &c. The stars of type B and A are from Walkey's catalogue.
Transcriber's Note: The following corrections have been made to the original text.
Page 4: "Terrestial distances" changed to "Terrestrial distances"