Scientific Intelligence. 259 
mile of the crater, and, after deliberate discussion with Mr. Kinney and 
companion, with different objects around us. Some of these calculations 
have been confirmed by a somewhat accurate measurement by 
Lyman, of Hilo. 
e diameter of the crater, which has been entirely formed by this 
eruption is about 1,000 feet, its height from 100 to 150 feet. One part 
of the crater was raised 50 feet during our presence on the spot. The 
Gothic spire, 700 feet high; then rising in one grand mass, 300 feet in 
on the top and sides by points and jets, like the 
ornaments of Gothic architecture. The New Yorker, who,as he gazes 
increased three-fold, and its substance converted into red-hot lava, in 
constant agitation, may obtain a tolerable idea.of one aspect of this ter- 
rific fire fountain. But he should stand at the foot of Niagara Falls, or 
18th of February, at about 3 o’clock, and continued twenty days. The 
crater is situated on the base of Mauna Loa, about 35 miles from Hilo, 
and 25 from the old crater of Kilauea. Its height, above the. sea, Is 
about 7,000 feet. It has formed a stream, winding down the mountain 
side, with several branches 30 or 40 miles long, from one-fourth to two 
miles broad, having a depth, in some places, of 200 or 300 feet. 
SCIENTIFIC INTELLIGENCE. 
I. CuemMIsTRY AND Puysics. 
I. Determination of Arsenic in Organic Syisiencts. ees 
has proposed a method of determining the presence of arsenic, base 
ce. 
must be in the form of oxyd or chlorid, and no other oxydizing substance 
hould be present. The substance to be investigated is cut into, small 
pieces, and introduced jnto a tubulated retort; fragments of fused chlo- 
