122 EFFECTS or LIGHTNING. 
ning ftruck Mr. Blanchard’s houfe, in third ftreet. This 
is a three ftory houfe, having two ftacks of chimneys, 
Faft and Weft of each other one on each fide of the high- 
eft part of the roof. Several bricks were thrown off one 
corner of the weftermoft ftack. The lightning is fuppof- 
ed to have come down a wooden rod, furnifhed with an 
iron {fpindle and vane, the whole about fourteen feet in 
length which ftood by the fide of this chimney top, though 
no marks ofit are vifible on the rod. From near the foot 
of this rod it proceeded down a rafter on the Eaft fide of 
the roof, fplitting it through its whole length, and break- 
ing up the fhingles over it. From the foot of this rafter 
it proceeded quietly down a copper {pout without injuring 
the building or leaving any other traces on it. 
Ne AY. 
4n Account of ihe effects of a ftroke of Lightning on a 
_ Louse furnifhed with two Conduéters,—in a Letter from 
Mefrs. Davip RitTENHOUSE and Francis Hop- 
KINSON; to Mr. R. PATTERSON. 
Read O&. N Tuefday evening, the 17th of Auguft, 
aS 1789, the dwelling houfe of Mr. Thomas 
Leiper, at his Mills, near Chefter, was ftruck by lightning. 
As this is a remarkable cafe, the houfe being furnifhed with 
two good condudters, Mr. Leiper requefted us to view the 
fituation of the building and the effects of the lightning, 
which we did three days after the accident. 
The houfe ftands at the foot of a pretty fteep afcent, on 
the Weft fide of Crum creek, and within a few yards of 
the mill dam. It is a regular ftone building 36 feet by 
32, two ftories high at the Weft end, above ground, ‘im 
three 
