800 TRANS. OF THE ACAD. OF SCIENCE. 
of making shot in our modern shot-towers. These, instead of 
being carried to a great height, as was formerly done, are now 
only about thirty feet high, and the drops of melted lead ae 
ss | 
ward into colder regions. But Volta’s theory s 
to be formed in the upper region first. If this were 
warmer vapor lower cloud would tend to ‘ 
th ize of the hailstones. + 
’ electricity 
ofp as 
