Formulæ showing the Relation between the Power of the Engine,

Page

Tables to facilitate the Computation of the Effects of Expansive

THE

STEAM ENGINE.

B

CHAPTER I.

THE STEAM ENGINE, A SUBJECT OF POPULAR INTEREST. THE OBJECT OF THIS WORK.-DISPUTES RESPECTING THE INVENTION.-HERO.-DE GARAY.- DE CAUS.-BRANCA.-MARQUIS OF WORCESTER.- PHYSICAL PRINCIPLES. ELASTIC AND INELASTIC FLUIDS. THEIR PROPERTIES. -APPLICATION OF THESE PRINCIPLES TO THE ENGINES OF HERO, DE CAUS, AND LORD WORCESTER. SIR SAMUEL MORLAND.- PAPIN.ATMOSPHERIC PRESSURE.-THE WEIGHT OF AIR.-LESS AT GREATER HEIGHTS. BAROMETER.- PRESSURE OF AIR. -ELASTIC FORCE OF AIR AND GASES. -FORCE PRODUCED BY A VACUUM. COMMON PUMP. -RAREFACTION BY HEAT. PAPIN'S METHODS OF PRODUCING DISCOVERY OF THE CONDENSATION

VACUUM. -HIS
SAVERY.

A

OF STEAM.

(1.) THAT the history of the invention of a piece of mechanism, and the description of its structure, operation, and