Astronomical dialogues between a gentleman and a lady, wherein the doctrine of the sphere, uses of the globes, and the elements of astronomy and geography are explain'd in a pleasant, easy and familiar way / With a description of the famous instrument called the orrery. By J[ohn] H[arris] F.R.S.

Licence: Public Domain Mark

Credit: Astronomical dialogues between a gentleman and a lady, wherein the doctrine of the sphere, uses of the globes, and the elements of astronomy and geography are explain'd in a pleasant, easy and familiar way / With a description of the famous instrument called the orrery. By J[ohn] H[arris] F.R.S. Source: Wellcome Collection.