The Art of Public Speaking cylinder, piston, water, and fire, is the steam−engine in its most elementary form. For a steam−engine may be defined as an apparatus for doing work by means of heat applied to water; and since raising such a weight as the pisto

The Art of Public Speaking cylinder, piston, water, and fire, is the steam−engine in its most elementary form. For a steam−engine may be defined as an apparatus for doing work by means of heat applied to water; and since raising such a weight as the p