C 53 ) 
wiflied. By the kelp of this Cylindrical Glafs [ thus 
kept my Account of what Rain fell, and generally twice 
or -thrice a day ; when I took fcverai other Obftrvati- 
ons, both of the Thermometer, Barometer, Winds, 
what Rain I found in the Receivers, if not more than 
made what was left in the Cylindrical Glafs a full pound, 
I again left in it ; but if there was more than that 
quantity, I filled it juft to the Pound mark, which I 
threw away, and did the like with the remaining Wa- 
ter, as often as it would allow, ftill keeping an Account 
chiefly of the Pounds thrown away, and noting a!fb 
the parts of a Pound remaining in the Glafi ; by the 
help of w^hich latter, and the parts remaining at any 
time before, by numbring the Pounds, and fubftrafting 
the Parts at the end, for Example, of one Month, from 
the Pounds thrown away, and the Parts remaining at 
the end of another, I find the quantity of Rain tallen 
betwixt thefe two tinies, and that Co as to adure me 
that I erred no more in the quantity of Rain of ano- 
ther Year, than by the miftake in the difTerences of 
the parts of a Pound in the firfl: and lafl: Obfervation : 
Whereas iliould I ftill write down the Rain that falls be- 
tween two Obfervations, I might be fiibjefl: to make as 
great a miftake in every one of them, and confequently 
be much more uncertain of the quantity of Rain fallen 
in many of thofe added together : Befides this Addition 
is longer in performing, and giving the quantity fought, 
than the Method I make ufe of I have added thefe 
Particulars to fiiew you how rutle trouble there is in 
this Task ; which therefore I hope fome of your Inge- 
nious Friends may be perfwaded to undertake, and then 
by continuing my own Obfervations, I may be further 
fatisfied, than hitherto I have been with them: For all 
I have yet learnt as to the main Point, is, that here we 
have almoft juft twice the quantity of Rain ihat falls at 
Paris. This County, and particularly that part of it 
I whtre 
