C ] 
have deduced them from time to time, in ufing Mr. 
Orme’s Glaffes, and keeping a Regifter of the W eather ; 
and fhall at the End of this Account infert feveral 
more Obfervations on the Diary of the Weather, now 
fent with this, which are not yet digefted into certain 
Rules, but may in- time, I prefume, by fome more 
skilful Perfonss or by a longer Series of Obfervations 
andRegifters of the Weather, which I defign to pur- 
fue, if Health continue. 
Rules and Obfervations for the improved 
Diagonal Barometer. 
1. This Barometer very rarely foretels Thunder, 
feldom falling at all before it, which Mr. Tat rick ob- 
ferves others do. 
2. In ferene and hot Weather, when the Mercury 
is high and riling, and you have all the pollible Cer- 
tainty of fair Weather the next Day, and if there 
happen to fall great Showers, you may conclude they 
have been driven upon you by Thunder, though you 
have heard nothing of it. 
3. When the Mercury is pretty high, and has fallen 
to foretel Rain, and it rifes again before the Rain 
cometh 5 it indicates there will be but little of ir. 
4. If the Mercury continues falling whilft it does 
. ram, it fhews it will rain the next Day. 
f. In fair Weather when the Mercury has continued 
high or riling, if it falls a little To-day about Noon, 
and towards the Evening rifes again, you muft expeft 
a fmgle Shower the latter part of the next Day, (or 
perchance by Noon) and then fair Weather again 
forward. 
6 . When the Mercury rifes gradually, (about half 
a 10th perpendicular) and continues fo to do for 
many. 
