138 Proceedings of the Royal Irish Academy. 
'No. 156. S Ctgni. — Maxima were observed by Eaxendell, 1884, 
December 4 (mag. 10-1), and 1885, JSTovember 6 (mag. 9-5). 
No. 158. S AQUiLiE, — Eaxendell has observed tlie follovring 
maxima and minima : — 
Maxima. 
1884, July 11. 
1884, JSTovember 25. 
1885, Angust 18. 
1885, December 25. 
Minima. 
1884, September 11. 
1884, December 21. 
1885, June 10. 
1885, October 2. 
He finds that since the end of 1883 the period has been subject to 
"great and very unusual irregularities," varying from 101 to 171 
days ; but no material change has taken place in the mean magnitudes 
at maxima and minima. The light curve is also very variable. 
{Observatory, March, 1886.) A minimum was observed by Knott, 
1885, June 16 (mag. 11-0). 
No. 160. E. Sagitt^. — Eaxendell finds that the minima of this 
star have been " reversed" in late years, and that " the mean drfference 
between the magnitudes at the two minima is slowly decreasing." He 
finds the period to vary from 69*96 to 70*98 days. Eaxendell observed 
maxima and minima as follows : — 
Maxima. 
Minima. 
Principal. 
Secondary. 
Mag. 
Principal. 
Secondary. 
Mag. 
1885, May 8. 
8-65. 
1885, Jan. 8. 
9-0. 
1885, June 21. 
8-75. 
1885, April 27. 
9-7. 
1885, Aug. 4. 
8-75. 
1885, May 30. 
8-95. 
1885, Sept. 80. 
8-65. 
1885, Sept. 17. 
9-9. 
1885, Oct. 20. 
8-9, 
1885, Nov. 24. 
9-9. 
1886, Nov. 27. 
1886, Nov. 10. 
In August, when a secondary minimum was due, the light remained 
constant at 8*8 for a period of sixteen days. ( Observatory, April, 1886.) 
