OF ARTS AND SCIENCES. 



243 



Morning's search terminates with this parallel. 



1878, Mar. 4.G, A a (ore) = 5'.2 ± OM. I feel quite sure that a has 

 not moved : the A a (~^0) was put clown from memory on March 2, 

 without much hope of its being right. But, judging from the config- 

 uration, I say that a has not moved appreciably. 



March 4.5. — Proceeded with regular search (power 400) after veri- 

 fying objects seen Feb. 28.5-(-. 



% . 



[xxx] 



a = 10*^ 2G"'.5. 

 6 = 4-ll°50/. 



a like elongated nebula — rather faint. Centre of it about same R. 

 A. as star h. I have represented it somewhat too far south — its 

 centre should be nearer parallel of star c. 



1878, Mar. 5.5. — Object fixed. 



Morning's search terminates with this parallel. 



Put up instrument all in order at 1.45 A. M. Cahill, watchman — 

 told him to wake me at 6 a.ji. 



March 5.5. — Proceeded with regular search (power 400). after 

 verifying object seen yesterday. 



Happened upon a nebulous mass — central condensation quite sharp 

 — in a = 10'' 39'", S = +12° 20'. I take it to be G. C. 2194, and 

 so do not observe its position accurately : it is very bright. 



Completed this morning the zone which fills up the gap to 8 = -|-12° 

 20' (see Feb. 6.5) ; and went still farther north — to 8 = + 12°40'. 



So that the adopted plane of orbit of trans-Neptunian planet is now 

 searched (without break) from 



t;=146°.8 

 to yz=18C.l. 



Put up instrument all in order at 3 a. m., March 6, and went home 

 at 3.45. Hayes, watchman in charge. 



Lawrence Orservatory, Amherst, Mass., 

 7 October, 1885. 



