448 EE. Hungerford—Observations on Snow and Ice 
Experiment No. 2.—Snow used marked on the ground 5° F. io aa 
9.45 a.M. of February Abe 3° F.—during the day near 0° F. 10P oa 
9 a. M. of February 11th —5° F., 10 p. um. 4° F., 7.30 a. Mm. of Februa aire 
8.30 “i M. 7° F. Duration of ats from February 10th 4 45 A.M. to Pawcian at 
8.30 a. ce brepagics 47 hours n 
Use a pair of parte moni iP iat full of snow, which accounts for the 
par glaciation of the lower e bottom was granular snow. Then 
rr. 
y defined. On the 1 
paint were lodged, but here — had been no change in their Cera: 
} .—Tem A. M 
Temperature of moulds — pressure 4°. 
Snow used was gran 
Temperatures, 9 A. M. — —4° F.,12.15 p.m 0° F.,2P ees ST BoM. 
—2° F., 9.40 P.M. —T F., B sa. of February 33 —3° F, Pm. 0° R, 9.30 P.M. 
—5° F. February 24th, 7.30 A.M. —10° F., 9 a.m. —7° a "Dur on 48 hours. 
Opened and found a a gradual transition from lea snow at the ‘betlon, of the 
prism to perfect ice at the top. The ice was clear and fine. e paint used in 
T 
the least moisture, and yet in the best of the ice brat was no trace of a spreading 
of the color. Bach particle was a distinct speck in the ice. 
g seems to negative the supposition that, at the low 
temperatures used, moisture intervenes to prepare re the way for 
regelation. In the case of prisms fully exposed to view, there 
important bearing on the resulta, Moreover, inasmuch as regel- 
be is spe necessity an instantaneous process, the evidence that 
me plays a not unimportant part in the process by which con- 
en 
particles, though that evidence hereafter to be reviewed is not 
as definite or complete as could be wished, bears, so far as it is 
allowed weight, 5 ne the application of that theory to the 
facts here i insist 
would - eae be supposed to overlook possibilities 
which must be conte miles in this connection, though they 
e conceived, that, in the case of Ha 
and of snow peelid ss moulds, inasmuch as it is not possible 
_ bring the pressure to ‘las cota either upon all points of trac 
caine faces of prisms or upon all points of the mass of snow, 
pressure "locally: poe molecules, in consequence of which, now 
at this point and next at another, slight moisture might be — 
_ developed, in which case true — world take place. In 
