TO

JOHN SHARPE, Esq. F. R. S.

OF STANMORE, MIDDLESEX,
(Late of Manchester,)
AS A TESTIMONY OF HIS FRIENDLY REGARD, AND OF HIS
LIBERAL ENCOURAGEMENT GIVEN TO THE PROMOTION
OF CHEMICAL SCIENCE:

AND TO

PETER EWART, Esq.

Vice-President of the Literary and Philosophical Society
of Manchester,

ON THE SCORE OF FRIENDSHIP,
BUT MORE ESPECIALLY FOR THE ABLE EXPOSITION AND
EXCELLENT ILLUSTRATIONS OF THE FUNDAMENTAL
PRINCIPLES OF MECHANICS,
IN HIS ESSAY ON THE MEASURE OF MOVING FORCE,[1]

THIS WORK IS RESPECTFULLY INSCRIBED BY

THE AUTHOR.

1 Manchester Memoirs, Vol. II. (second series.)