extraordinary Degree of Cold at Glafgow, 471 
Ci never difpofed to depofit its contents except upon bo- 
* { dies as cold or colder than itfelf.” And yet that this is 
frequently the cafe feems probable from a number of 
common appearances. We often find, after a night of 
froft, the flates and other thinner parts about a houfe 
whitened with hoar-froft, when the walls and more folid 
parts of the building remain quite free. In like man- 
ner the fmaller branches and twigs of trees often acquire 
this frozen ornament, when . the main branches and 
trunk remain naked for a long time; and, in general, 
any thin or detached body, capable of being eafily 
cooled, attach hoar-froft the fooneft. 
In favour of this general pofition, the following re- 
markable cafe lately occurred, which at the time I 
fhewed to Dr. reid, in confequence of whofe approba- 
tion I am induced at prefent to bring it into view. 
Between the public library and the buildings of the 
new court there is a long rail compofed of bars of caff 
iron, but divided into two parts by two maffy ftone pil- 
lars which fupport the iron gate-way that leads into the 
garden. The bars are about fix feet high and an inch 
fquare, and fattened with lead into a ftone parapet below 
in the ufual way. A few bars much larger are fet in 
among the reft at regular diftances, in order to give the 
rail- more liability. On Sunday morning, Feb. 13, when 
we 
