246 Dr. Garnett's Arrangement 
ftances for any length of time, though ever fe~ 
moderately or flowly, the fame effect follows; which 
is the chief reafon why the air does not always 
become warmer after precipitations from it. 
. rath. That the barometer being lower, and 
continuing fo longer than what can be accoutited 
for by immediate falls, or ftormv weather, indicates 
the approach of very cold weather for the feafon : 
and alfo, cold weather, though dry, is always accom- 
panied by a low elise till néar its termi- 
‘nation. 
r5th. That warm weather is always preceded 
and moftly accompanied by a high barometer; and 
the rifing of the barometer in the time of broken 
or cold weather, is a fign of the approach of warmer 
weather: and alfo if the wind is in any of the cold 
points, a fudden rife of the barometer indicates 
the approach of a foutherly wind; which in thé 
winter generally brings rain with it. 
_ 16. That ftreamers (aurora borealis) occurring 
for any length of time, or when very bright, are 
a fign that the atmofphere is undergoing a con- 
fiderable change ; and that either the vapours whiclt 
floated in the fuperior regions can be no longer 
fufpended by the electrical ether which adheres to 
them, and are therefore on their defcent, which 
caufes the aurora to be driven upwards to the ftill finer 
and higher regions, from the repulfion of the more firm 
and denfe mediums below; or it is a real decom-- 
 pofition of the conftituent parts of the atmofphere 
in 
