500 ON FINDING THE TIME ACCURATELY, &C. 



Requisite Tables. The Table of natural sines given in the Ap- 

 pendix to that work, is most convenient for the calculation of 

 the time by this method. If this communication is thought 

 worthy of a place in the Transactions of the Society, of which 

 I have the honour to be a member, I shall have the satisfaction 

 of making another, respecting the mode of determining lati- 

 tudes by the sextant most correctly, by a series of observa- 

 tions made near noon. I should also wish to submit a paper 

 on the Repeating Circle, and the extraordinary accuracy of the 

 results I have obtained from observations made with a circle 

 of Troughton's, twelve-inch in diameter, if the Society shall 

 think the matter deserving of its attention. 



Paris, 23d November 1817. 



The 



