Transactions of the Historical and Literary Committee of the American Philosophical Society Vol I-II, III, pt I . return in thofewalls, lole a great deal of their efFe£l when they come tobe foul with foot; for a thick blanket-like lining of footprevents much of the hot air from touching and heating-:the brick work in its pafTage, fo that more fire muft bemade as the flue grows fouler : But by burning the fmokethey are kept always clean. The fame method may alfobe of great advantage to thofe bufinelTes in which largecoppers or caldrons are to be Written at Sea, 17S5. N° VIL. A Theory o
Transactions of the Historical and Literary Committee of the American Philosophical Society Vol I-II, III, pt I . return in thofewalls, lole a great deal of their efFe£l when they come tobe foul with foot; for a thick blanket-like lining of footprevents much of the hot air from touching and heating-:the brick work in its pafTage, fo that more fire muft bemade as the flue grows fouler : But by burning the fmokethey are kept always clean. The fame method may alfobe of great advantage to thofe bufinelTes in which largecoppers or caldrons are to be Written at Sea, 17S5. N° VIL. A Theory of Lightening and Thunder Storms, by AndrewOliver, Efq. of Salem in the State of Mafachufetts. ^^if; ¥ ^ ^^^ been generally, and, confidering the phe-J. nomena themfelves, very naturally fuppofed,that the eleftric charges which are exhibited in repeatedflalhes of lightening during a thunder ftorm, are previouflyaccumulated in the vapors which conftitute the cloud ; andthat thefe vapors, when by any means they become eitherover-charged with elei£lric matter, or are deprived of their^. ,,*.:..,.«.. natural.
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Keywords: ., bo, bookcentury1800, bookdecade1810, bookidtransactionsofhi02amer
