CHARLES T. PORTER
Honorary Member of The American Society of Mechanical Engineers
Author of “A Treatise on the Richards Steam-engine Indicator
and the Development and Application of Force in the
Steam-engine,” 1874; “Mechanics and Faith,” 1885
REVISED AND ENLARGED
FIRST EDITION
FIRST THOUSAND
NEW YORK
JOHN WILEY & SONS
London: CHAPMAN & HALL, Limited
1908
Copyright 1908
BY
CHARLES T. PORTER
THIS BOOK IS DEDICATED
TO THE MEMORY OF
MY FATHER AND MOTHER
My Father