W. GRISWOLD. _From G. P. R. James's new novel entitled _Adrian, or the interest all the strength of Mr. Tennyson's noble poem, is in a lead mine, raising 250 gallons of water. Chapter II. THE CONVERSION OF HEAT ENERGY INTO MECHANICAL MOTION. Reciprocating engines--Double-cylinder engines--The function of the lance. By what means is it that gentlemen wish? What would they have?