Dear Sir,

The French I write, bad as it is, being much less easy to me than English, I shall now follow your example, & shall answer you in y^e same language you write in.

I have perused your papers w^th singular pleasure, & am not at all surpris'd to find that y^e doubts of some persons are much clearer than y^e decisions of others. But as you have the talent beyond all Mankind, except y^e Marchioness du Chastellet, who has found the secret of making M^r Leibnitz himself to speak clearly, of rendering intelligible to others, whatever you conceive yourself, it is for that very reason y^e more incumbent upon you to be sure that your conceptions are just, & it is y^e more y^e duty of those you consult, to apprise you of y^e least suspicion they may have, whether you are in y^e right, or not. For which reason, & because doubts are apt to beget doubts, I must acquaint you, that either I do not rightly comprehend your meaning, or else there is something amiss in y^e following articles, w^ch therefore I beg you will reconsider

	1re partie. Art. XI, XVI.
	2me partie. Art. 2, 9 à l'égard de la gravitation.

You see, S^r, the liberty I take; it is owing to y^e sincerity I have always practised, especially when any of my friends have consulted me before publication, & I ought to use it with you above all others, because your notions, true or false, always leave either a clear conviction, or at least a strong persuasion in y^e reader's mind. It were great pity therefore, that one so well qualified to preach y^e truth, should ever be employed in propagating any unorthodox opinions.

As for our Society I shall lay your papers before them when ever you please, but you must not expect any decision; for We are no less dubious & uncertain at London, than you are at Paris. We never decide but upon facts only, & leave all reasoning to y^e judgement of y^e Publick, to whom indeed it properly belongs.

If you cannot convert Madame du Chastellet, Pray Heaven convert her, else I doubt she'll pervert both you & me. I am,

Sir,

Your most faithfull & most obedient servant,

Ja^sJurin

Austin Fryars June 23 1741