VOL. XXVI.] PHILOSOPHICAL TBANSACTTONS. 16/ 



the 23d, re-entering the sun's face just at the time and place that I expected it. 

 At 4 o'clock the spot appeared distinct, but slender, with an eliptical speckly 

 mist about it, and five or six light coloured streaks. June 8, at 6 in the morn- 

 ing, the spot was very visible, and traced again its former path, coming in ex- 

 actly where expected ; it kept its shape, but those lemon coloured streaks disap- 

 peared, though itself and the mist about it grew bolder and broader visibly, as 

 it re-entered the sun's disk. June Q, at 5 this evening, the spot had not altered 

 its shape, but advanced gradually over the sun's disk, as it had formerly done. 

 June 10, at noon, the sun shining very bright, I had an opportunity of being 

 assured it was the same spot; I plainly saw it move over its former path, and it 

 was then distant from its nearest limb 2g seconds of time. At 5 in the evening 

 its shape was altered, appearing larger and blacker. June 1 1 was a bad day for 

 observation, but I had a sight of it: it continued black and bold as before. 

 June 12, at 7 in the morning, the sun's body being very clear, I saw the spot 

 through the 18-foot glass, retaining its former shape. June 13, by this day 

 noon the spot was arrived at the same point of the sun's disk that I found it in 

 on Monday at noon. May the I7th; which makes me inclinable to believe it 

 was the very same spot. June 14, the distance of the spot from the next limb 

 of the sun's disk was 45 seconds of time from the anterior edge of the sun's 

 body; and on Tuesday, May the 13th, it was observed to be in the very same 

 place of its path, within a single second of time. At 4 it had altered its shape, 

 and it was distant from the preceding limb 6l2 such parts as the sun's semidia- 

 meter is QOO. June 15, at noon, the solar spot was distant 32 seconds of time 

 from the leading limb of the sun's disk, and covered the very place where the 

 same spot had been observed on Wednesday the IQth of May. June l6, no 

 sun-shine. June 17, no sun-shine. June 18, at noon I observed the solar 

 spot very slender, but black and bold to appearance, the mistiness about it on the 

 right hand perceivable, and that on the left grown slender, in proportion with 

 the spot itself, and found it distant 5 seconds of time. June 1 9, all this morn- 

 ing, it being clear weather, I saw the spot distinctly; at 12 I perceived that all 

 the cloud, or misty matter, that used to surround the spot, was invisible, and 

 the spot itself reduced to little or no breadth, in comparison to what it had 

 been towards the sun s centre, and so close to the limb of the disk, that I could 

 only perceive a small streak of the sun's light between it and the limb of the 

 sun's body; at 2 o'clock I could just perceive it, being extremely slender. 



The first revolution I saw the spot half in the circumference of the sun*s 

 limb at 2 o'clock on Sunday, May the 23d; and the second revolution I just 

 perceived it at half an hour after 2 o'clock on Saturday the 19th of June. 



On Sunday, June 27, about in the evening, I observed several spots in the 



