Table of Contents

Extraterrestrial geology

• You have access

  Letter to the superintendent of the U. S. Coast Survey, containing a catalogue of bright lines in the spectrum of the solar atmosphere, observed at Sherman, Wyoming territory, USA, during July and August, 1872

  C. A. Young

  American Journal of Science November 1872, s3-4 (23) 356-361; DOI: https://doi.org/10.2475/ajs.s3-4.23.356
• You have access

  On the Allegheny system of electric time signals

  S. P. Langley

  American Journal of Science November 1872, s3-4 (23) 377-386; DOI: https://doi.org/10.2475/ajs.s3-4.23.377
• You have access

  Elements of planets (122) and (123)

  C. H. F. Peters

  American Journal of Science November 1872, s3-4 (23) 400-401; DOI: https://doi.org/10.2475/ajs.s3-4.23.400