i 
T. S. Hunt— Quartz and Silicification in California. 871. 
received at Menlo Park, N. J., and was at once recognized as an 
iron meteorite. A letter from Mr. Watson informs me, further, 
that the mass was originally thickly encrusted with scales of 
rust of a red-brown color, and which fell off while being heated 
in the forge. 
It now weighs $24 Ibs. (= 14:75 kg.), is somewhat per 
lar in shape (see cut) ; its three diameters being about 25™ 
its average thickness gm 
An an ode by J. B. Mackintosh, K. M., shows it to be of 
copper, phosphorus and ecarbon.* ’ The ee oe fig- 
ures are well developed on this iron. They are shown in figure 
, Which is of exact natural size. This mictannite is one of 
three discovered by the writer in the Southern States last 
year. Descriptions of the others will be given later. 
January 29th, 1880. 
Art. XLVII.—On the recent formation gf Quartz vee on Silt- 
jen in California ; oe T. Sterry Hun 
in California. It consisted of a mass of m ‘ky vitreous quartz 
in which a recent fracture at Lee an imbedded frag ment, 
— half an in ch in diam r, of the characteristic so-called 
opinion epee “* Professor a that the quar artz had 
made part of a vein formed in the auriferous gravel subsequent 
to the solidification of the latter. 
* The ana alysis is ey ities made in duplicate, and when ata & will be 
vt tis com in this Jou w. 
his 
23 
BS 
Ee FE 
sPE 
o 
fu 
overlying volcanic rock. to eicplain the solution of silica. ry! oie 
out by the writer (page 350 of the present bry the removal of the silica ina 
inp form from the silicates which make up a large part of the eure ey 
$ not require the intervention of alkalie 
