Chemistry and Physics. 101 
account for this and observes ‘‘ What could produce these special 
forms? If one could fancy himself perched on an eminence 
about 500 feet above a city of snow-white pyramidal houses, 
with smoke-colored flat roofs covering many square miles of sur- 
face and rising ridge above ridge in steps, he might form some 
faint idea of this beautiful freak of Nature.” 
Vast bodies of ice terminating in cliffs upon the sea are nu- 
merous in Prince William Sound, and the thundering noise of 
the falling of large masses of ice was heard by Vancouver.* 
On the shores of an arm of Stephens Passage (northwest of 
ing perpendicularly from the water's edge. 
From these various observations we ma. conclude that the 
ss 
scoring the mountains as they descend, and pushing their accu- 
mulations of rocky debris either into the ocean, or the rivers of 
the interior. 
he 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND PHYSICS. 
1. On the influence of the adhesion of vapor in experiments upon the 
ion of heat.—The subject of the absorption of radiant heat by. 
aqueous vapor has been again taken up by Magnus who has succeeded in 
air loaded with transparent vapor has no greater absorptive power 
air which contains no vapor at all. Tyndall replied to this paper, and the 
subject was then examined independently by Wild, who fully confirmed 
- . . . c us 
gation beg sft 
apparatus of the same dimensions with that of Wild and of similar con- 
struction. Experiment soon proved that the walls of the tubes containing 
the dry or moist air through which the radiant heat passed exercised a 
Se aie Voyages, iii, 186, (1794), quoted by Findlay, Directory of Pacific 
i, 479, oe es 
t Pogg. Ann., cxxix, 57. 
