I have read with great pleasure my Dear Doctor your ingenious Hypothesis about the cause of the extraordinary Motions of the Earth and certainly if one may suppose the air at liberty in the internal part of the Earth and to be compressed by the internal atmosphere its density may be vastly great. I do not doubt but you have read Dr Halley’s Hypothesis of an internal Globe moving in this part internal and pretending that the surface of That Enveloppe was luminous or shining so that might be there a new world of inhabitant. I am very glad to find that I had the same idea with you of the whole Earth’s being a magnet by the ferruginious parts of which it is composed for it is what I wrote in a paper for the Academy long-time ago for I was but a very young man at that time. Your Idea of a magnetism General that extends through the whole Universe is really very grand and very curious and seems to have a great many presumptions in its favour.—I do not know whether you will approve of some small alterations I have made in the translation of M. De la Mothe. Accept My Dear Doctor of my Best compliments.