Burnham: Measures of Proper Motion Stars 
largest known in any star as faint as this. My later measures 
of this are as follows: 
A and C 
1905.717 
66?4 
I 27"37 
5.720 
66.4 
127.73 
5.736 
66.5 
127.66 
1906.906 
66.1 
129.53 
6.964 
66.1 
129.46 
7.258 
66.1 
130.01 
7.271 
66.2 
130.14 
7.291 
66.3 
130.38 
1908.444 
65.45 
132.12 
.460 
65-53 
131-92 
.479 
65.69 
131-79 
.482 
65-54 
132.17 
.518 
65 30 
132.05 
1910.260 
65.08 
134-17 
.299 
65-35 
I 34.76 
•337 
65-15 
134-16 
.356 
65.20 
134-70 
•395 
64.98 
134.82 
1911.241 
65-03 
135-70 
.260 
64.88 
135-63 
.280 
65.28 
135-39 
• 334 
65.10 
135.85 
1912.236 
64.88 
137.56 
• 255 
64-45 
136.77 
.274 
64-55 
137-54 
.296 
64-55 
i37.8o 
For other measures of 
this remarkable star 
see Monthly 
Notices 71 , 208. 
The following are the mean results of all the 
measures of 
AC: 
1887.81 72?02 
I02?28 
in 
Eng 
1894.85 69.23 
II 2 . 3 I 
2n 
Eng 
1905.72 66.4O 
127.59 
3 n 
P 
I907.I4 66.16 
I29.9O 
5 n 
P 
1908.47 65.50 
132.01 
5 n 
P 
1910.33 65.15 
134-52 
5 n 
P 
1911.28 65.06 
I 35.64 
4 n 
P 
1912.26 64.61 
137.42 
4 n 
P 
A and E 
1906.906 
ii6?5 
I 5o"93 
6.904 
116.6 
150.77 
7-258 
116.9 
150.86 
7.271 
116.7 
150.85 
1908.460 
ii 6?47 
i5o':88 
• 479 
116.66 
150.91 
.482 
116.50 
151-19 
.518 
116.20 
150.65 
1910.299 
116.52 
150.52 
.356 
116.65 
150.44 
• 375 
116.33 
150.58 
• 395 
ii 6.35 
151.40 
A and F 
1906.906 
356?7 
i 67 r 5 4 
• 6.964 
356.8 
167.47 
7.271 
357-2 
167.71 
The following are the 
mean results 
of these 
and other 
measures: 
A and D 
1887.73 
296?40 
I 24"34 
2n 
Eng 
1894.85 
296.00 
125.32 
2n 
Eng 
1905.72 
295.70 
126.12 
in 
P 
1907.14 
295.56 
126.40 
5 n 
P 
A and E 
1887.81 
n6?oo 
152^65 
in 
Eng 
1894.85 
116.37 
152.20 
in 
Eng 
1905.72 
116.50 
150.75 
in 
P 
1907.10 
116.67 
150.85 
5 n 
P 
A and F 
1887.73 
357?77 
168'.'20 
2n 
Eng 
1894.85 
357-50 
168.11 
211 
Eng 
1907-05 
356.90 
167.57 
3 n 
P 
These measures give for the proper motion of 17 Lyrae: 
AD 
R. A. + o"i263 
Deck + 0^0342 
AE 
0.1260 
0.0224 
AF 
0.1307 
0.0402 
Mean 
0.1277 
0.0323 
Therefore the corrected proper motion is: 
o"i32 in 75?8 
These positions give for the most probable apparent annual 
motion of C: 
i "542 in 45-9 
The proper motion of 17 Lyrae, with which the moving star 
was first compared, is given from meridian positions as follows: 
Auwers o"ii2 in 68? 5 
Newcomb 0.121 in 74.8 
Boss 0.121 in 83.8 
Applying this to the apparent movement of C, we have for 
the real proper motion of that star: 
i?6s8 in 48?2 
For the purpose of obtaining a new and independent value of 
the proper motion of C, I have connected it with several other 
stars too faint to have any sensible movement, and these 
measures were repeated after an interval of two years. The 
recent measures of these and other stars in the field are as 
follows: 
A more accurate value of this movement can be found from 
the measures of the other distant stars which it is certain have 
no sensible proper motion. The recent p measures are: 
1908.444 
.460 
• 479 
C and E 
i73?28 
172.93 
173.43 
I22?6o 
I22.SI 
122.70 
A and D 
• 537 
173-42 
122.61 
1906.906 
295°5 
I 26 '? 5 i 
1910.260 
174.18 
124.06 
6.964 
295.6 
126.51 
.299 
174-53 
124.23 
7-258 
295-7 
126.03 
■ 337 
174.27 
124.40 
7.271 
295.3 
126.32 
• 356 
174.48 
124.56 
7.291 
295-7 
126.61 
•375 
174-70 
124.30 
239 
