[ 2 5 5 ] 
Do not we reckon a Memory, or aHiftory, good, 
that calls to mind, or notes every valuable or re- 
markable Event, though not every Tale or trifling 
Story ? 
The g reared Storm that has been in our Days, was 
Jan, 8. 1734,-y. On the 5th the Mercury began to 
fall, and on the 8th was a 10th below 28 Inches 5 which 
has not been feen in this Age, or perhaps fince Torri - 
cellius’s Time 5 thence I could plainly indicate, that it 
would be the greateft Flood we ever heard of, or the 
greateft Storm we ever felt 5 the latter of which it 
proved. 
Some Rules and Obfervations for fore- 
knowing the Weather, by the rifiag and 
falling of the Mercury. 
Though rifing always prefages fair, and falling foul 
Weather, yet there are feveral Difficulties and Niceties 
in making a true Judgment from them, and herein 
confifts the chief part of the Art. 
I (hall not trouble you with the feveral Obfervations 
made by Dr. Halley , Dr. Beal , Dr. Derham , Mr, 
‘Patrick, and others, though they are mod of them 
applicable to this improved 'Diagonal Barometer , by 
reafon their Efteem has caufed them to be in fo many 
Hands, and in moft Authors on the Subjed, and be- 
caufe I have colleded them in order to be made pub- 
lick, at the Requeft of the Improver of the Barometer , 
Mr. Orme , and for his Ufe, which fome time fince 
were put into the Hands of my very worthy Friend 
Dr. Defaguliers , who is acquainted with Mr. Orme 
and his Glafles. I fhall only infert here fome few Ob- 
servations, which I believe may be called Rules, as 1 
1£ k have 
