Some days ago, I received your favour of the 11, with the French poem on Astronomy. The Society had recd a copy of the same work from the Author, & therefore they wish me to return your copy.

They have eagerly embraced your proposal respecting the universal standard of weights and measures, and have referred the subject to a Committee who earnestly solicit, not merely your co-operation, but your detailed instructions on this important point.

Mr Thos Voigt, a very ingenious mechanic, a son of our chief coiner at the mint, would very cheerfully undertake to make you such an astronomical clock as you desire; the price 65 dollars, without any case. He prefers, both to the wooden & grid-iron pendulum, one with a simple steel rod, to which is attached a mercurial tube which acts as a compensating thermometer. This is the pendulum which Mr Rittenhouse used, & is still in use in his very accurate astronomical clock now in the custody of our Society—You will please to signify your pleasure on this subject

Along with the Poem I send you a Nautical Almanac for the year 13, which is as far as Mr Garnett has yet published. I am ashamed to apologise for my delay in sending you the improved artificial horizon I so long ago promised. It has been long made and only waits for a spirit-level to accompany it which I spoke for to a lazy mechanic three months ago—