كتب ذات صلة

Fossil foot-marks in the red sandstone of Pottsville, Pa.

• Geodetic instruments of precision at the Paris Exposition and in European workshops.
  المؤلفون: Davidson, George
• The apparent projection of stars upon the bright limb of the moon at occultation and similar phenomena at total solar eclipses, transits of Venus and Mercury, etc., etc.
  المؤلفون: Davidson, George