84 PHILOSOPHICAL TRANSACTIONS. [aNNO 1666. 



I saw the limb pretty round, and very well defined without radiation. The 

 parts of the phasis of it had various degrees of light. About a and f, its north 

 and south poles, (in the fig. Q. pi. 2) it was somewhat darker, and gradually 

 grew brighter towards h and e, two belts or zones ; the one of which {h) was a 

 small dark belt crossing the body southward; adjoining to which was a small 

 line of a somewhat lighter part ; and below that again, southwards, was the large 

 black belt c. Between that and e, the other smaller black belt, was a pretty 

 large and bright zone; but the middle c/, was somewhat darker than the edges. 

 I perceived, about 3h. 15m. near the middle of this, a very dark round spot, 

 like that represented at g, which was not to be perceived above half an hour be- 

 fore. And I observed it in about 10 minutes time to be got almost to d, keep- 

 ing equal distance from the satellite A, which moved also westwardly, . and was 

 joined to the disk at ?, at 3h. 25m. After which, the air growing very hazy, 

 and as appeared by the baroscope very light also in weight, I could not observe 

 it ; so that it was sufficiently evident that this black spot was nothing else save 

 the shadow of the satellite h, eclipsing a part of the face of Jupiter. About 

 two hours before, I had observed a large darker spot in the larger belt about h, 

 which in about an hour or little more, moving westwards, disappeared. About a 

 week before I discovered also, together with a spot in the belt c, another spot 

 in the belt e, which kept the same way and velocity with that of the belt c. 

 The other three satellites in^he time of this eclipse, made by the satellite, were 

 westwards of the body of Jupiter; appearing as bright through the tube as the 

 body of Jupiter did to the naked eye ; and I was able to see them longer through 

 the tube, after the day-light came on, than I was able to see the body of Ju- 

 piter with my naked eye. 



Observation of Saturn. By Mr. Hook. N" 14, p. 246. 



June 29, 1666, between 11 and 12 at night, I observed the body of Satm-n 

 through a 60 foot telescope, and found it exactly of the shape represented in 

 the figure R, pi. 2. The ring appeared of a somewhat brighter light than the 

 body ; and the black lines a a, crossing the ring, and b b crossing the body 

 (whether shadows or not, I dispute not) were plainly visible ; whence I could 

 manifestly see that the southern part of the ring was on this side of the body, 

 and the nothern part behind, or covered by the body. 



A sad Effect of Thunder and Light7img. By Thomas Neale, Esq. 



N'U, p. 247. 



On the 24th of January 1665-6, Mr. Brooks of Hampshire, going from Win- 



