On Water and Air. 
[April, 
250 
of ,k, ,i, b, it. own expansion. [The needle followed the 
?iSs3=^i^= 
SiSpiiiHEis 
sequence of .ha. "“t,™" 1 '" pt.formk the 
A ie her region is thus expanded, in vntue of the 
l T IrS ire upon it, .be aqueous v. pout cou.a.ned n the 
air comes down in this way as cloud. Well, these clog 
of course descend upon us as ram ; but sometimes th y 
descend upon us as snow. The aqueous vapour, when thu 
conthnsed'ln the upper regions of .be 
nnlv converted into particles of water, but 11 tne 
sufficient it is converted into a solid ; and nothing can be 
more beautiful than those crystals of snow which arep 
duced in the air in calm weather, when the aqueous vapou 
of the atmosphere is congealed. A great many years g 
Dr Scoresby observed the beautiful forms exhibited by the 
descending snow in the Ardtic regions. Mr. Glauber 
also made S beautiful drawings of those snow crystals as foun 
m I E n n the a w.nter of !8 5 9 I wished to ascertain the motion of 
a elacier in mid-winter. I think I was beside the Mer oe 
bface on the 28th December, 1859, and during a portion o 
Se day heavy snow fell, and I think that in about half an 
hour mv hat was covered for an inch thick with snow. On 
examffimg thTs snow I found every particle of it war 1 found 
to consist of wonderfully beautiful erysta s. but 
going to show you some of these drawings (F g. ), 
