99 
The telescope used was the equatorially mounted achro- 
matic of 70 inches focal length and 5 inches aperture with 
a power of 68. 
By A. Brothers, at 110, Upper Brook Street, Manchester. 
53° 27' 56-0 // N. 8 m - 54*38 s - W. 
Disappearance. 2 h - 59 m> 6 8, Local Sid. Time. 
Reappearance ....4 10 13 „ „ 
The disappearance was instantaneous. The reappearance 
was not so well observed, as the star must have emerged a 
few seconds before it was seen. The telescope is a refractor 
equatorially mounted, and in other respects identical with 
the one employed by Mr. Baxendell. Power used, 88. 
“On the Elements of the Variable Star R Persei,” by 
Joseph Baxendell, F.R.A.S. 
In Professor Schonfeld’s “Results of Observations of 
Variable Stars, &c.,” read at the last meeting of the Section 
it is stated, “that the period of R Persei is about 205 "5 days, 
and that one period must be added to the number hitherto 
assumed to have happened since the date of Bessel’s obser- 
vations.” This value of the period is derived from the 
following four observed maxima compared with Bessel’s 
single observation of the star, when at or near a maximum 
on the 6th of January, 1833. — 
1865, March 12. 
„ October 6. 
1866, April 27. 
„ November 20. 
R Persei has been under pretty regular observation at 
Mr. Worthington’s Observatory since the announcement of 
the discovery of its variability by Dr. Schonfeld in Sep- 
tember, 1861, and a projection of all the observations has 
