Mineralogy and Geology. 431 
lege, a School of Mines, and a Museum including the geological collec- 
tions of this State.” 
telegraph, on the 12th of April, brought information that the 
Legislature of California had decided on the continuation of the Survey. 
4b Large Mass of Native Copper.—Mr. J. B. Townsenp, agent of the 
Minnesota Mine, has communicated to one of the Editors the following 
facts regarding the large mass of copper found in 1857 :—* The ‘ great 
‘ I ‘4 of . . . 
me men were employed in cutting at first, but as the 
e smaller, only a few could work at the cutting at a time. 
veral heavy blasts were necessary to loosen the mass from its hed. At 
re- 
Placed by certain silicates, which have not only filled up the chambers, 
cells, and septal orifices, but have been injected into the minute tubuli, 
are thus perfectly preserved, as ma be seen on removing the cal- 
*erpentine, and a dark green alumino-magnesian silicate near chlorite and 
loganite, The pyroxene and serpentine are often found in contact, filling 
chambers in the fossil, aud were evidently formed in consecu- 
¥e stages of a continuous process. 
observations confirm the views which I have already expressed 
erican Jou I 
» lead ancient Laurentian Foraminifera, and that of the allied forms 
hay and 
@ shown, are injected with glauconite, is obvious. 
