G. E. Moore on Brushite, a new Mineral. 43 
every 43°, making approximately a ring of these small bodies, 
But we cannot for a moment entertain the idea that nearly all 
these bodies have been discovered. ey are very small and 
turbations in their motions, and it is highly probable that many 
of them become satellites of some of the planets, and finally 
intersect. The mean width of the whole zone so far as known, 
lies between the limits 2-145 (Feronia) and 3-452 (Maxamiliana 
giving a breath of 1 307, which is rather greater than the diam- 
eter of the sphere of attraction of Kirkwood’s Asteroid -planet, 
At present we shall add nothing respecting comets, as Prof. 
Kirkwood has called attention, in several places, to the orbits of 
these bodies, 
Hector, N. Y., Nov. 11, 1864. 
3 
Art. V.—On Brushite, a new mineral occurring in Phosphatie 
uano; by GipEoN E. Moors, Ph.B. 
(Communicated to the California Academy of Sciences, Sept. 5th, 1864.) 
Ty the spring of the present year, I received, through the kind- 
hess of Wm. E. Brown, Esq., of Mare Island in this State, a 
Specimen of a mineral discovered by him in a cargo of phos- 
phatie guano at Camden, N. J. from 
derived is not known,’ and, though letters of inquiry have been 
t 
the Carribean islands, and more particularly to the island of 
ombrero as its probable source. Itis very probable that the 
™mineral may be recognized among the crystallized products oc- 
gan? 
n a letter fro . Moore, dated San Francisco, Nov. 13th, 1864, he states 
that he has soostiaieed locality of the new mineral to be Avis Island in the 
i Sea.—Eps. 
