Problems in time and space : a collection of essays relating to the earth, physically and astronomically, and cognate matters / by F.A. Black .. Black, F.A. (Frederick Alexander), 1862-

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Black, F.A. (Frederick Alexander), 1862-
Astronomy.; Logarithms.; Calendar.
  • How the distance and size of the sun were measured.
  • A simple means of ascertaining the day of the week of any given date in the Christian era.
  • Measuring the earth.
  • Solar and sidereal time.
  • The reform of the calendar.
  • The magnetism of the earth.
  • The movements of the sun and of the earth in space.
  • Logarithms and their inventor.
  • Gravitation the chief cause of the general oceanic circulation.
  • Twilight and dawn.
  • Appendix.
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