J. C. Watson—Intra- Mercurial Planets. Si 
These give the following differences in right ascension between 
(a) and (0) and the sun: 
(4)—© ‘ (0)—o 
from Aa Aa 
Ss —8™ 31°65 — 26™ 32°65 
i —8 376 ~—26 38°2 
(aa —8 256 —26 26°6 
Bon —8 31°5 —26 32°4 
and using the differences of declination as already given, we 
obtain the following results: 
Washington M. T. Object. Planet— © Apparent. 
Aa Aé a t) 
h. m. . 6. m 8. h. m. 8. 
1878, July 29. 6 16 37 (a) — 8 32 —0°22 § 27 24 +18° 16’ 
WB. 8 46 (+) —2632 —0 35 8 9 24 
occupied in passing from the eye piece to the hour circle. I 
believe that this observation can be relied upon as giving the 
place of a second intra-mercurial planet. 
Ann ARBor, Sept. 5, 1878. 
see the objects which I observe 
I have 
fe used a hand comet-seeker of two and 
a half inches aperture, with a field of five and a half degrees, 
and he swept twice over a space thirty degrees in length and 
Jour, Biase Series, VoL. XVI, No. 94.—Ocr., 1 
