47 2 Mr. wilson’s Account of a mojl 
we had the flight froft accompanied with a fog, it was 
entertaining to obferve how the hoar-froft had fettled 
during the night upon thefe bars. Very little was to be 
feen upon the fiat fides, but a great deal upon the an- 
gles, by which means from the top downward every 
bar was garnifhed with four fringes, which made the 
whole rail look very gay and ornamental. Running the 
eye along the foot of the bars near to the parapet it was 
obferved, that the fringe of hoar-froft upon the corners 
flopped fhort about twelve inches from the bottom, and 
that fo much of every bar was entirely free. Two bars 
next the houfe and two next the library were like wife 
perfectly clear of it from top to bottom. One bar next 
the pillar of the gate was quite free, and the fecond had 
contracted but little. The fame thing precifely may be 
laid of the two bars contiguous to the other pillar. And 
it was alfo obferved, that the few thicker and ftronger 
bars were lefs fringed at the corners, and were quite free 
much farther above the parapet than the others. 
It is manifeft, that during the night the air furround- 
ing the bars mull have been conftantly endeavouring to 
make them as cold as itfelf, whilft they, on the other hand, 
refilled this change by drawing heat from every neigh- 
bouring fource which offered it, namely, from the para- 
pet, from the pillars in the middle, and from the pillars 
at 
