T. A. Fdison—The Sonorous Voltameter. 879 
Art. XLVIL— Discovery of two more new Planets; by ©. H. F. 
Prrers. (From a letter to the Editors, dated “Litchfield 
Observatory of Hamilton College, Clinton, N. Y., October 
5, 1878. 
September 9, I have named Phthia. 
The following observations have been obtained: 
[191] Jsmene; 11-5 magnitude: 
App. a. App. 6. 
bh. Sas 8 
mop. 23, 16 =. PAG Cs +4° 567 —” (approx.) 
, AG 19.21 F116 96 32 12 ring micr. comp. 
30, 13 21 51 1 5 37°53 +4 17 57-4 10 fil. micr. ie 
Oct. 2, 13 16 18 1 4 27°04 + 81 19-8 4 : 
Bs Jie 
Sept. 30, 14 2 46 23 45 4:56 —8° 87 35:3” 10 fil. micr. comp. 
Oct. 1, 10 20 20 23 44 33°66 —8 15 15°8 l2ring “ 
2, 12 28 49 23 43 50°44 —8 23 368 10 filar “© 
4, 13 10 48 23 42 35°61 —8 38 57-4 l2ring “ 
The strong motion of the last planet in declination discards 
the idea of its being identical with [162] Laurentia, which was 
observed only in one appearance, and has not been found, 
neither in the preceding nor in the present opposition. The 
numbers attributed to the last two planets therefore are upon 
the assumption, that the planet found by Professor Watson 
On Sept. 22d also is not identical with [162]. 
Ar?. XLVIIL—The Sonorous Voltameter ;* by. THOMAS A. 
Epison, Ph.D. 
are evolved by electrolysis. With a given current and a given 
resistance a bubble is obtained each second, which is seen at the 
moment of rising and which at the same a a sound when 
it reaches the air, The resistance may be reduced so as to give 
* Read at the St. Louis meeting of the American Association, 
’ 
