# Category:A treatise on astronomy, in which the elements of the science are deduced in a natural order, from the appearances of the heavens to an observer on the earth; demonstrated on mathematical principles

## Media in category "A treatise on astronomy, in which the elements of the science are deduced in a natural order, from the appearances of the heavens to an observer on the earth; demonstrated on mathematical principles"

The following 13 files are in this category, out of 13 total.