PHILOSOPHICAL TRANSACTIONS. 



673 



VOL. VI.] 



whilst he was pouring it out of one glass into another, during its fluidity, it 

 was dispersed all over the glass it was poured into, suddenly congealing into 

 very fine threads, many of which were extended from one side of the glass to 

 the other, and, hanging as it were in the air, formed just like the subtilest 

 cobwebs, not at all rigid, but, by reason of their exquisite subtlety, pliable, 

 and scarcely perceivable by the eye. 



The Pleiades observed in I67I, and predicted for 1672. By Mr. 

 John Flamsteed. Translated from the Latin, N" 79, p- 30Gl. 



Mr. Flamsteed here predicts certain appulses and occultations of the Pleiades 

 by the moon, as they may be expected to happen in the course of the year 1 672. 

 Preceding the statement of the expected appulses, he gives a short tablet of the 

 latitudes and longitudes of those stars, with their magnitudes and literal marks, 

 a, b, c, d, e, f, g, h, i. The predicted appearances are now quite useless; but 

 the tablets of places, marks, &c. are as follow : 



The stars of the Pleiades, An. 1^72. 



The western brighter star 



Between this and the northern telescopic one 



The western and more northerly 



The highest in the quadrilaterum 



The lowest southern opposite 



The middlemost bright star 



That in the eastern angle 



The upper of the eastern telescopic 



Anotlier telescopic star 



Mark 



Long. 



Lat. N. 



Mag. 



24° 45' 15" 



24 46 47 



24 54 48 



25 1 24 

 25 2 18 

 25 19 48 

 25 41 29 

 25 42 55 

 25 14 4 



8' 51" 



19 21 

 28 19 



20 39 

 53 59 







52 19 



56 51 



42 37 



The observations in 1671 are then given as follow: 



I have a tube of ] 3f feet, furnished with convex lenses, and a very exact Town- 

 ley's micrometer, with which, in the clear nights of last October and Novem* 

 ber, I have often measured the minute distances of the Pleiades, and that with 

 such success, that my repeated observations never differed 20'' from one another, 

 and very seldom !(/. They are also confirmed by the former obser\^ations of the 



VOL. I. 4 Q 



