372 Reéramination of American Minerals. 
used as anvils. One lies within the Presidio, and is of a very 
feet ; its interior about two. It weighs nearly 1200 lbs. The 
other piece is in front of the Alcalde’s house. It weighs about 
1000 pounds, and has an elongated prismatic form, serving well 
the purposes of an anvil. It is partially buried in the soil, but 
having two feet of its length projecting above the ground. The 
third piece I did not see ; but was told that it was much smaller 
than either of the others. By permission of the authorities, our 
blacksmith undertook to cut off some specimens, in which, how- 
ever, he almost entirely failed—the metal being so tough and hard. 
It yields to the hammer, and has a clear ring, not unlike that of 
bell-metal. The surfaces were rounded, and rusted,—closely re- 
sembling a mass of refined cast-iron that had been exposed to 
the action of the weather fora long period. The surfaces that 
have received the blows of the hammer, where used as an anvil, 
are quite polished. 
“To obtain these specimens would be attended with no little 
difficulty, owing to the remoteness of the locality, and the broken- 
down condition of animals when reaching this point.” : 
The route of transportation recommended by Lieut. Parke, 1s 
that, via. Fort Yuma, distant 275 miles from the locality, on the 
California side ; and from thence by water, to the head of the Gulf 
of California. Measures are already on foot for the removal of 
one or more of the masses, to this part of the country, which it 1s 
greatly to be desired will be crowned with success.* 
———— 
rcpt cnaratae 

Art. XXXIX.—Reézramination of American Minerals: Part 
1V—Boltonite ; Iodid of Silver ; Copiapite ; Owenite ; Xeno- 
time ; Lanthanite; Manganese Alum Ps Apophyllite ; Schret- 
bersite ; Protosulphuret of Iron; Cuban; by J. Lawrence 
Sarr, M.D., Prof. Chem. Med. Depart. University of Louisville.t 
37. Boltonite, identical with Chrysolite. 
Botronire was first described as a new species by Professor 
C.U. Shepard. He made the specific gravity from 2°8 to 2-9, It 
was subsequently examined by Professor Silliman, Jr., who found 
* The above Sonora meteoric irons were described and illustrated with figures ™ 
a paper by Dr. J. Lawrence Smith, presented to the American Association at 1t8 
meeting at Washington in April last—a paper which was to have ap in our 
last number, but is still delayed. The masses were seen by officers of the late Bound- 
Commission, and figures are published in Bartlett's Personal Narrative (8¥9 
D 
all who take any interest in the subject.—y, 1. g, 
