424- Intelligence and Miscellaneous Articles, 



•& 



Ephemeris of Halleys Comet. 



In transmitting to you the foregoing ephemeris of Halley's comet, 

 in the chance of its being useful, I must beg to apologise for having 

 left you and other observers for two days without an ephemeris, and 

 also to state that I am not yet able to transmit an exact comparison 

 of all the observations made by me in the course of that time. From 

 the very irregular motion of the comet, the task of reducing is un- 

 usually laborious. To this were added difficulties which it was not 

 by any means in my power to remove. 



As the subsequent observation of the comet may be rendered easier 

 by a more correct knowledge of its position, I have thought it better 

 to complete the accompanying ephemeris previous to any other, 

 in order that it may reach in time those who may require it. I have 



