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.

  • Harris, John, 1667?-1719.
Date:
1719
Catalogue details

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.

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    17 2 Afirommical Dialogues. becaufe I would not have any part of it hidden from me. But the Handle goes on } a Turn or two more will have carried the Moon half round in her Orbit, obferve how fhe moves: ’Tis now 25 Turns, you fee, your Patch is come fafe about to you ; off with it. N o, faid fhe, there it fhall flick till we have done, fince you won’t have it be on my Face any more: I love dearly to fee it turn round and perhaps fhould I put it on, it may make my Head turn quite round too, as I think it begins to do already without it} but pray turn on your Handle however. M A d A M, faid I, at the end of 27 Turns and a Quarter, you fee I have made the Moon perform her Revolution round the Earth: Mercury is got about a third part of his way •, and in 17 Turns more will have finiftied juft half his Revo¬ lution. And Venus, you fee, will then have advanced a fifth part of her Way, in proportion to the Magnitude of her Orbit: And the Earth alfo hath traverfed in the Ecliptick the Difiance of above three Signs, ! And