C 3 
From July the 7th, 1766, to July the 7th, 1767, 
there fell into a rain-gage fixed 
1766 from the 7th of July to the end 
Augull 
September 
Oflober 
November 
December 
1767 * January 
February 
March 
April 
May 
. June 
from the ift of July to the 7 th 
Below the top 
Upon the top 
of a houfe. 
of a houfe. 
inch. 
inch. 
3 .S 9 I 
3.210 
0,558 
0.479 
0,421 
0.344 
2,364 
2,061 
1,079 
0,842 
1,61 2 
1,258 
2,071 
1.4S5' 
2,864 
2,494 
1,807 
1.303 
1.437 
1,213 
2.432 
1.745 
1.977 
1,426 
0.39S 
0,309 
22,608 
iB,i 39 
Upon Weft- 
minfter Ab- 
bey, 
inch. 
2,311 
I 0,508 
1,416 
0,632 
0,994 
1.035 
i.33r 
0,587 
0.994 
1,142 
j 1,14s 
12,099 
By this table it appears, that there fell below the 
top of a houfe above a fifth part more rain, than what 
fell in the fame fpace above the top of the fame houfe, 
and that there fell upon Weftminfier Abbey not 
much above one half of what was found to fall in the 
fame fpace below the tops of the houfes. This ex- 
periment has been repeated in other places with the 
fame event. What may be the caufe of this extra- 
ordinary difference has not yet been difeovered j but 
it may be ufeful to give notice of it, in order to pre- 
vent that error, which would frequently be com- 
mitted in comparing the rain of two places without 
attending to this circumftance. 
It is probable, that fome hitherto unknown property 
of eledtricity is concerned in this phenomenon. This 
' VoLt LIX« A a a power 
