[ 188 ] 
thing was, to prelerve it when raifed, and ufe it with* 
out wafting any, fo that it might have its full effedt. 
I had obferved, that whenever a fingle wire was made 
ufe of inftead of a chain in difeharging the jars, 
the effedt- was much ftronger;. and upon making 
further experiments, I found that when the difcharg- 
ing parts were not all in clofe contadt, fuch as being 
fere wed tight together, or ground into one another, 
the effedt was confiderably diminifhed. In conftrudt> 
ing the difeharging apparatus, I. therefore connived 
that all the parts fhould be in clofe contadt, by icrew- 
ing grinding, or foldering, them together ; and thus 
the eledtrical fire exerts its whole force on the body 
upon which the experiment is made. 
III. Laftly, it often happened in difeharging the 
jars when loaded very high (as they mu ft be to kill a 
large animal, or to force the fire through bodies that 
make a great reliftance), that the perfons operating, 
notwithstanding, all their ikill and care, received the 
whole or part of the fhock. This has deterred many 
from repeating feveral ufeful experiments,., and has 
intimidated others that attempted to repeat them fo as 
to make them fail of their effedt. To remov-e this 
inconvenience intirely, the difeharging frame is con- 
trived, which,. at the fame time that it prevents the 
wafting of the elcdtrical fire, leaves no poftibility of 
the operator's ever receiving any fhock. This will 
plainly appear upon infpedting the figure annexed. 
Explanatio.no/Tab. XI. 
AB, a mahogany board \ \ feet long, which fup- 
ports the jars F, G, II, and the conductor KL. 
This 
