of the Cambridge Observatory. 



163 



fraction of a second has been added to, or subtracted from, both 

 times, in order to remove the repeating decimals. 



The following are the makers' names and numbers of the 

 chronometers used : 



A, Parkinson and Frodsham, 980. 



B, Parkinson and Frodsham, 701. 



D, Parkinson and Frodsham, 741. 



E, Morice, 169. 



F, Murray, 516. 



G, Molyneux, 801. 



Means of comparisons made at Greenwich by Mr. Sheepshanks, 



Oct. 21, about 2\ 



X 2 



