VOL. XXXI.] PHILOSOPHICAL TRANSACTIONS. 331 



be met with in the present zodiac; and particularly I htive sought out and settled 

 the places of two telescopic stars, to one of which Jupiter was observed to ap- 

 ply by Galileo, at the beginning of March id 10, New Stile, and which is the 

 very first observation of that kind that was made with the telescope. (Nuncius 

 Syder. p. 27, edit. prin. 161O.) On the 28th of February, one hour after 

 sun-set, a small fixed star was in conjunction with the 4th satellite, as it since 

 appears to have been, being then eastwards of the planet. The next day, 

 March 1, at the same hour, the centre of % was in the angle of an equilateral 

 triangle with the 4th satellite and the star : and again, March 2, Jupiter being 

 retrograde, had passed the conjunction of the star, and a line from the star, 

 perpendicular to that of the satellites, fell on the first satellite then 2^" to the 

 west of the planet, and in latitude the star was more southerly than the satellite 

 8 minutes. This star, by the direction of the place of Jupiter at that time, I 

 found out, and by comparing it with others in the catalogue, having nearly the 

 same declination, I settled its place in n 13° 24-i-' to the time of the British 

 catalogue, with 0° 25' south latitude. 



Another remarkable observation of Saturn is recorded in Riccioli, (Astron. 

 Reform, p. 280) said to have been made at Modena by the Marquis Malvazzo, 

 on July 3, N. S. 1662, when the eastern ansa of Saturn touched a fixed star. 

 By the then place of Saturn, I looked out for this star, to which Saturn is at 

 this time very near, and after the same method I settled its place, the beginning 

 of 1690, the epoch of the British Catalogue, in 29*^34' of Scorpio, with 2"^ 

 0^\ north latitude. By this it will appear how defective the observed place of 

 Saturn is stated in Riccioli, there being above 7' erred in his latitude. 



Observation of a Parhelion^ Oct. 26th, 1721. By the same. N°369, p. 211. 



This morning, 26th of October, being on the river coming up to London, 

 about half past 10, the sun being then about 20° high, I observed a circle 

 about the sun, which is by no means unusual, when the air in chilly weather, 

 such as it is now, is replete with snowy particles ; which circle was of the size 

 it always appears in, about 23° from the sun, and faintly tinged with the colours 

 of the Iris. When this circle happens, I always look out, to see whether any 

 other of the phaenomena that sometimes attend it did at that time appear, such 

 as Parhelia, and other coloured circles, concentric with the sun, and some- 

 times, as once I saw it, eccentric ; as also a white circle round the zenith, in 

 equal altitude with the sun : but this time,^ the air being thickened with a hazy 

 vapour, and the smoke of the town, I could only see to the eastward a lumin- 

 ous white patch, which for about 20 minutes shone through the thick air very 



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