Churchman, John, -1805. **G_389A.192 An explanation of the magnetic atlas, or variation chart, hereunto annexed; projected on a plan entirely new... — Philadelphia: Printed by James & Johnson ... M,DCC,XC. 46, 5, (1) pp. Tables. 22% cm., in 4s.
hts card was printed at the Boston'
  
Public Library, February 9, 1935. ) D6666 — Terrestrial magnetism.