B« 
192 Miscellanies. 
, ticularly the latter. Mr. Rumker’s letter not having given the final 
results deducible from his equations of condition, the committee ap- 
pended a letter from Mr. Sears C. Walker, in which he deduces from 
Mr. Rumker’s equations, the following corrections of the solar and 
lunar elements given in the Nautical nearing ac. 
d (© +@) 91 B79 nirvewn net 
+ 
d(©-@)=-1".750= “ difference of semidiameters. 
e. 
de =+1"516= * moon’s parallax 
eS — Vos moon’s —— 
These corrections being referred to the moon’s orbit and its secon- 
daries, give, after Bessel’s notation (Astr. Nachr. 320) _ 
+o ot ona == cor. moon’s eee in true orbit. | 
ry to 
Mr. Peters, dus, Noches 326) cans dia pecan. cbeertatiaie 
had obtained 
¢== — 3//,650. 
f= - 5.472. 
Mr. Walker having previously reduced the American observations | 
with Peters’s co-ordinates and corrections, furnishes a comparison of 
the longitudes from Greenwich, derived by different computers from 
this eclipse. 
{Walker from;Walker from 
Rumker’s | yi s 
_ Canatiomis | co-ordin eS. 
& 
8 13.835 8 1349 
1 16535 1. 15 
0 40.615 0 4094 | 
39. 
| 
Washington, (Capitol,) - 
ema  Sehioo _ Delaware Co. Pa. 
rs private Observatory, 
e,) 
OUST a 
Germ 
Philadelphia, aed Soe 
West Hills, (Coast Survey,) - 
Southwick, Mass., A. Hole omb’s p- Obs. 
Providence, Brown ae ersity, - 
(Dorchester, Mass., Wm. C. Bond's p. ¢ _ Obs. 
451 12894 51 13. 
not reduced. 4 45 38.3 
ld 44 16. 
Pee se oS we hg 
he 
o 
ww 
oo 
sags 
BER 
a see 
or 
Ww 
sé 
& 
44 0 
Mr. Walker finds ee the resolution of Rumker’s s equations of con- 
dition, + 1”.516 for the correction of Burkhardt’s constant of the 
moon’s equatorial parallax. In the Memoirs of the Astronomical So- 
ciety, Vol. x, Mr. Henderson gives + 1’.5 as the value of this correc: _ ‘ 
tion, derived from Plana’s Théorie de la Lune, and + 1’.3 as the val- jie. on 
ue of the same, derived from a discussion of all the meridian obset- 
vations of the moon made in 1832 and 1833, with the mural circles at ~ 
Greenwich, Cambridge, and the Cape of Good Hope. This correc- | 
tion had hitherto been derived chiefly from theory and meridian ob- | 
servations. It is seldom that an eclipse or occultation has been 8? | 
extensively observed as to furnish a determination of this element | 
In the present instance, the results by the three independent meth 
present a close agreement. 
Dr. , one of the Vice Presidents of the Society, stated that 
- had received a letter from the Prince of Musignano, informing him 
Bee ree 
