180 PROCEEDINGS OP THE AMERICAN ACADEMY 



and for Circle West, — 



for £ Aquarii, the equation = — 0.37 -\- J r -]- .12G — .246, 

 „ ^ Cygni, „ z= + 0.04 + z/ t — .003 — .333, [rej] 



„ a Cephei, „ = + 0.23 + z/ t — .110 — .515. 



From which we derive 



Jt = -{- 0^562 ± 0^026, 



and the resulting clock correction 



r-\-/j r = — 16«.2G0 -f- 0'.562 ± 0.026, 

 = — 15^G08 ± 0».026; 



whence the Bond clock is fast of Harvard College Observatory, side- 

 real time, — 



15'.698 ± 0'.02G, 



as determined by L. Waldo. 



The character of the mounting of the transit instrument at Waltham, 

 combined with a previous discussion of the observations, renders the 

 introduction of the terra A' a' superfluous. And in the absence of a 

 determination of the latitude, the latitude is assumed to be 



(f = 42° 23'. 



From the observed stars, we derive the following equations : — 



for Circle West, = + 0^26 -\- J r -\- 0.42 a -\- 1.06 c, 

 = -|-0.47 + Jt + 0.G9 a -\- 1.00 c, 

 = — 3.21 + z/r — 2.61 a -f 4.56 c, 

 = — 0.13-\-/Jr-\- 0.06 a -\- 1.31 c, 

 = + .22 + z/ T + 0.55 a + 1.02 c, 

 = — .98 4- z/ T — 1.99 a 4- 3.74 c ; 



and for Circle East, = -|~ 0-'^*^ -\- /J z — 4. 64 a — 7.26 c, 

 = -f 0.70 -|- J T — 0.02 a — 1.38 c, 

 = + 0.24 -\-/Jt — 2.70 a - 4.67 c, 

 = -1- 0.86 -\-Jt — 0.71 a — 2.13 c, 

 = -}- 1.18 + J r + 0.7G a — 1.01 c, 

 = -\- 0.93 + . / r 4- 0.05 a — 1.30 c ; 



