172 PHILOSOPHICAL TRANSACTIONS. [aNNO 1738. 



larities of the moon's surface occasioned the same appearances, in some mea- 

 sure, as at the formation of the annulus. 



The beginning of the eclipse at 2^ 5™ 36* 



The beginning of the annular appearance . . , , 3 25 55 



The end of the annular appearance 3 3 J 43 



The end of the eclipse 4 44 51 



At Hopeton-house, 9 miles west, and a little northwards from Edinburgh, 

 Lord Hope observed the annular appearance begin at 3^ 25*", the end of this 

 appearance at 3*' 31™, and the end of the eclipse at 4'" 444-'". His lordship was 

 obliged to observe the eclipse at a distance from the clock, and to determine 

 the times by a pocket watch, that had been adjusted by a very good dial that 

 day at 12 o'clock; but he says, that the duration of the annular appearance 

 was 6"", as near as could be judged by a watch that did not show the seconds. 



At Crosby, on the west coast of Scotland, about 4 miles north from Air, 

 Mr. FuUarton observed the eclipse to begin at 2 o'clock. A distinct annulus 

 was formed about 20™ after 3, which continued exactly 7*", measured by a pen- 

 dulum vibrating seconds. It appeared rather broader on the lower verge of the 

 sun ; but the difference must have been very small, for it was but barely dis- 

 cernible in a species of the eclipse 6 inches over, cast on a piece of paper be- 

 hind the eye- piece of a telescope 6 feet long. He adds, that the day light was 

 not greatly obscured, appearing only so much dimmer than usual, as that of 

 the sun is, when seen through a very gentle mist in a fine morning in April or 

 May. Sir Thomas Wallace found that the annular appearance continued at his 

 house, near Lochryan in Galloway, 5™. 



From the observation at Crosby, the centre of the annular penumbra seems 

 to have entered Scotland not far from Irwine. It next proceeded towards the 

 east, with a considerable inclination northwards ; and probably left Scotland not 

 far from Montrose on the east coast ; for the Rev. Mr. Auchterlony found, 

 that the annular appearance continued there J'", as near as he could judge by 

 an ordinary watch. The annulus also appeared to him of a uniform breadth, 

 through a common telescope. This observation, though not so exact as that at 

 Crosby, is however confirmed by that at St. Andrew's, mentioned below. These 

 two observations at Crosby and Montrose, were made nearer the path of the 

 centre, than any others that have been communicated. 



As for the southern limit of this appearance, the eclipse was not annular at 

 Newcastle, and there wanted about 40° of the sun's limb to appear in order to 

 form an annulus, according to the observation of Mr. Isaac Thomson, com- 

 municated by Mr. Blake, a gentleman of the county of Durham, who was 



