596 Proceedings of the Royal Irish Academy, 
Some recent measures are : — 
1883-86 : 32°-16 : l"-34, Engelmann. 
1888-67 : 32 -50 : 1 -16, H. Struve. 
59. 85 Pegasi. The companion has described about 222° of its 
apparent orbit since its discovery in 1878. Owing to the faintness of 
the small star the pair has always been a difficult object, even with 
large telescopes. 
Recent measures are : — 
1888- 69 : 126°-7 : 0"-95, Burnham (36-inch 
refractor). 
1889- 59 : 134 -7 : 0 -94, Burnham. 
\ 1890-55 : 139 -0 : 0 -78, „ {private letter). 
I find that the proper motion of 85 Pegasi is 1"-221 in the direction 
141°-25. (See Monthly Notices, E. A. S., April, 1889.) 
NOTES ADDED IIST THE PEESS. 
Professor Pickering says that, in the spectra of % 228 and 42 
Comse Berenices, "the hydrogen lines are strong in the ultra violet 
portion of the spectrum," a fact which seems to indicate that the 
fainter component is of the first type " {private letter, July, 1890). 
4. O :§ 20 = 66 Piscium :— 
1886-656 : 351°-5 : 0"-45, Leavenworth. 
8. 40 Eridani (BC). Other measures are : — 
1886-001 : 112°-2 : 3"-22, Leavenworth. 
1888-869 : 105 -5 : 2 -81, Tarrant. 
18«. O 5 215. My elements represent all the measures fairly 
well, both in angle and distance. The change of position angle has 
been very slow, owing to the fact that the companion has been moving 
