C 85 X 
«s 
\rill, Experiments and Obfervations in Electricity. 
By Mr. William Henly, F. R. S. 
P A- R T I. 
Remarks on the effects of lamp-black and tar, or lamp-black 
and oil, as protedlors of bodies from the Jlroke of light- 
ning', .with fimilar effetfs produced by experiments in the 
artificial electricity . 
Read, Jan. 16 and 23, | Ar, lewis, inhis Philofophical Com- 
^ merce of Arts, p. 364. mentions a; 
remarkable inftance of the effect of a coating of lamp- 
black, and .tar, in preferving thofe parts of the maft of a. 
ffiip, which were covered with it, from damage by a 
ftroke of lightning which fhivered the other, that is, the 
uncaated parts of it, in a very extraordinary manner. 
The account is recited at large in voL.XLV.III. of the 
Philofophical, Tranfadlions. Captain nairne, in his 
Remarks on . the Effedls of Lightning, on the mails of. 
feveral velfels which were llruck in the Bafon at Que- 
bec/^, mentions, in his letters to fome friends in London, 
no lefs than five inltances, where the lightning palling 
(a) His own.fhipj the Generous Friends r, was twice preferved there by. 
his condu&or* 
oyer 
