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This is the cafe with the Britijh Mufeum , a build- 
ing alfo of conliderable confequence, where there 
are no other conductors, than v/hat are formed by 
the copeings, gutters t and pipes , which are all of lead, 
and communicate with the ground. Now it is from 
the great quantity of metal contained in the feveral 
pipes, together with the other circumftances at- 
tending them, that I confidered that building (in 
a former paper laid before the royal fociety) as being 
fufficiently fecured, from thofe dangerous accidents. 
But if any gentleman fhould be difpofed to en- 
tertain a doubt about it, or indeed of any other part 
of my reafoning on this fubjeCt, a declaration of 
thofe doubts may be attended with good confe- 
quences, as they will neceffarily open the door to 
a more minute inveftigation. 
I have now, Sir, gone through the reafons which 
I propofed to lay before the royal fociety for the 
rejecting of points. And I am very forry, in the 
courfe of this letter, to have been under the ne- 
ceffity of mentioning any differences in opinion, 
which paffed between the members of the com- 
mittee, to whom this important matter was referred. 
I think, however, I fhall ftand excufed to the fo- 
ciety, and the public, when it appears, as I hope 
it now fufficiently does, what my motive has been j 
namely, to ftate clearly, and impartially, the ob- 
jections which I conceived to lye againft pointed 
conductors : and to difclofe without any referve , 
the principles on which fuch objections are grounded. 
I am, S I R, with the greateft relpeCf, 
Your mod obedient, and moft humble fervant, 
8th December, 1772, 
Great Ruflel-ftreet, 
Bloomfbury. 
Benjamin Wilfon. 
P. S. 
