An essay on electricity. Explaining the theory and practice of that useful science, and the mode of applying it to medical purposes : with an essay on magnetism / by George Adams.

  • Adams, George, 1750-1795.
Date:
1785
Catalogue details

Licence: Public Domain Mark

Credit: An essay on electricity. Explaining the theory and practice of that useful science, and the mode of applying it to medical purposes : with an essay on magnetism / by George Adams. Source: Wellcome Collection.

    31/528 (page 15)
    and Infers, agreeable to the fyftem of Mr. Euler, that the principal difference between condudt- ors and non-condu&ors of electricity confifts in the fize of the pores of the condiment parts of the body. A LIST OF ELECTRIC SUBSTANCES AND OF THE DIFFERENT ELECTRICITIES PRODUCED BY THEM. The back of a cat Pofitive Smooth glafs Rough glafs f Every fubftance with which f it has been hitherto tried. fEvery fubftance hitherto Pofitive ^ tried, except the back of f a cat. f . fDry oiled filk, fulphur, I Pofitive < p metals. f Woollencloth,quills,wood, j Negative d paper, fealing-wax, white f wax, the human hand. i | Pofitive Amber, air.* I Tourmalin ^ ^Negative Diamond, human hand. * i. e. By blowing with a pair of bellows upon it. By this means many eleCtrics may be excited, and fome better if the air blown is hot, although, in both cafes, very lit- tle electricity can be obtained. Hare’s