VOL. XXIX.] PHILOSOPHICAL TRANSACTIONS. 15^ 



very few seconds, to show that the clock went still a quarter of a minute too 

 fast. And the end of the eclipse approaching, I attended the moment of it 

 with all the care I could, and concluded the complete separation of the sun and 

 moon to be at 10^ 20"* 15* by the clock, or exactly 10^ 20"^ correct time. 

 What we have received from other places is as follows. 

 The Rev. Mr. James Pound, rector of Wansted in Essex, and R. S. S. gives 

 the following account of the principal phaenomena observed there ; he being 

 furnished with very curious instruments, and well skilled in the matter of ob- 

 servation, and having rectified his clock by several altitudes of the sun, taken 

 both before and after, viz. 



At 8^ 6™ 37* The eclipse first perceived. 



The total immersion. 



The emersion. 



The just end of the eclipse. 



The continuance of total darkness. 

 The near agreement of this observation with our own (the difference being 

 only what is due to the difference of our meridians) makes us the less solicitous 

 for what was noted at the Royal Observatory at Greenwich, from whence we 

 can only learn that the duration of total darkness was 3"^ IV. 



The Rev. Mr. W. Derham, rector of Upminster in Essex, and Reg. Soc. Sod. 

 assisted by Samuel Molineux, Esq. secretary to his Royal Highness the Prince, 

 and other persons of quality, made the following observations there, which he 

 has lately communicated, viz. 



At 8^ 7"^ 41' The eclipse began. 



Total darkness began suddenly, and Aldebaran appeared. 



The emersion or end of total darkness. 



Continuance of total darkness. 



End of the eclipse, by a 134- foot glass. 

 Our professors of astronomy, in both universities, were not so fortunate : 

 my worthy colleague Dr. John Keill, by reason of clouds, saw nothing distinctly 

 at Oxford but the end, which he observed at 10^ 15"* l0^ As to the total 

 darkness, he could only estimate it by the sudden change of the light of the 

 sky ; and reckoned its continuance to be but 3"* 30'; which was certainly too 

 little, the centre of the shadow having doubtless passed very near Oxford. And 

 the Rev. Mr. Roger Cotes, at Cambridge, had the misfortune to be oppressed 

 by too much company, so that, though the heavens were very favourable, yet 

 he missed both the time of the beginning of the eclipse and that of total 

 darkness. But he observed the end of total darkness at 9^ 14"* 37% and the 

 exact end of the eclipse at 10^ 21"* 57^. 



