450 Scientific Intelligence. 
3. On Argentiferous Galena from Arkansas ; by Prof. W. W. Ma- 
THER, (communicated for this Journal).—Some of this ore from a lo- 
cality not communicated, was lately sent me for cupellation. Different 
specimens afforded silver, varying from 44 to 71 ounces of silver to the 
ton of lead. I have cupelled hundreds of lead ores, and although I have 
never cupelled one without finding a trace of silver, there are few as 
such statements. I had never seen it, neither had any one on the Ge- 
ological survey of Ohio seen or described it, till last autumn, when f 
this coal bed. Persons not acquainted with modes of examination, aud 
the liability of deception, seeing the coal in the hill and along the 
slope of the hill, where slides had occurred but were not recognized, 
will be the only fuel used for smelting. The iron ores are so abundant 
that the lands on an average will yield 5,000 to 10,000 tons of iron 
per acre. 
5. On the supposed bed of Coral at a high elevation, on the Island 
of Maui; by Dr. C. F. Winstow, (from a letter to J. D. Dana, dated 
Naltham, Mass., March 13, 1853.)—In your paper on Changes of 
Level in the Pacific Ocean, published in the March No. of the Am. 
four n., at pages 171 and 172, 1 notice the account given you by my 
riend, Rev. Mr. Andrews of Molokai, of the existence ef coral forma- 
ocean, you ob: 
et: further examined. In this you are right. I have been ye, on 
ns 
pressio 
-lt was calcareous, 
to decide the question of its organic origin. Sulphuric acid exhib 
c rganic origin. Sulphuric acia ext 
Tany times, and examined them with some care. My first a 
n, like that of Mr. Andrews, on simply looking at the rock, wast 
teareoakee 7 
a a! 
