622 



PHILOSOPHICAL TRANSACTIONS. 



[anno 1711. 



Observations on the Spots seen on the Sun, from the Year 1 703 to 17 i I : with Mr. 

 Crabtries Opinion on the Solar Spots. By the Rev. Mr. William Derham, 

 F.R.S. N°330, p. 270. « 



As my former observations of the solar spots, published in N° 288, were 

 imperfect, I will therefore give a better account of the spots and faculae that 

 have been seen on the sun since ; there having, I suppose, few of those ap- 

 pearances escaped my sight, since their first being seen in 1 703 ; and because I 

 am now better provided with good instruments to take their places on the sun, 

 viz. a micrometer, after Mr. Gascoign's manner, to take their distance from 

 the sun*s northern or southern limb, which is parallel to the pole of the earth ; 

 and a half second's movement, to measure their distance from the sun's eastern 

 or western limb. 



In this following table, may be seen at one view, what spots or faculae fell 

 under my cognizance. 



^ Table of Spots and Faculce on the Sun, visible at Upminster, since July 1 703 . 



1703. 



Octob. 



r^'^-M. 



Jan. 



Feb, 



Mar. 



May 



. 9 

 10 

 11 



_30 



23 

 25 



. 7 

 8 

 9 



10 



11 



13 



April ... 1 1 

 12 

 13 



Jun 23 none 

 Some 24 

 Vanished 25 



June. 



July . 



27 



28 



30 



• 1 



» 3 



24 



Sept. ... 30 



Octob. . . 2 



3 



5 



6 



23 

 24 

 26 



25 

 26 

 30 

 31 



Sept. 



Faint . . 

 Extinct. 



My 



Languid . . . 

 Scarcely "> 

 visible / 

 More visi- "1 

 ble / 

 Extinct 

 Appears 



Feb. 



March 



■ 5 



6 



8 

 10 



Aug * 31 



Sept. ... 

 Spot &* 



No spot 

 nor* 



} 



' 12 

 16" 

 17 

 19 

 21 

 27 



28 



1708. 



July 31 



August .... 1 

 5 

 6 



22 

 23 

 24 

 28 

 Septemb. ... 1 



Novemb. ... 5 



Dec 



14 

 15 

 16 

 18 

 24 



6 



9 

 11 

 12 



14 

 18 

 21 



June . . 

 Extinct 



29 

 30 



Octob 31 



Nov 1 



4 

 8 

 10 

 N.B, This 15 

 Nov. 15, ano- j/r 

 ther spot arose 

 on the eastern 1 7 

 side of the disk, J g 

 while this ■. ^ 



was on the -^ 



western. 20 



_22 



4 

 10 



Decerab. 



2.9 

 30 



