Astronomical calculations,1820-1821


Date: 1820-1821 | Size: 1 volume(s), 1 volume, 30 p.


This volume contains calculations of the distances of stars, eclipses, and longitude, made by William Maule, James Cresson, Joseph Jeanes, James James, and Robert Hutchinson, pupils in the Friends Academy, where Roberts was a teacher.

Background note

Joseph Roberts, Jr., a schoolmaster, was elected to the American Philosophical Society in 1829.

Collection Information

Physical description

1 volume, 30 p.


Received from John B. Roberts and accessioned, 1913 (49784).

Early American History Note

Joseph Roberts was a teacher at Friends Academy. This volume contains various astronomical calculations done by him and his students for 1820-1821.

Indexing Terms

Family Name(s)

  • James, James.
  • Maule, William.


  • Educational Material
  • Meteorological records.
  • Scientific Data

Personal Name(s)

  • Cresson, James
  • Hutchinson, Robert
  • Jeanes, Joseph
  • Roberts, Joseph,1793-1835.


  • Astronomy.
  • Education
  • Meteorology -- Pennsylvania -- Philadelphia.
  • Science and technology