Chapter XIII: General Economy of Steam Power

Mechanical efficacy of steam -- proportional to the quantity of
water evaporated, and to the fuel consumed. -- Independent of the
pressure. -- Its mechanical efficacy by condensation alone. -- By
condensation and expansion combined -- by direct pressure and
expansion -- by direct pressure and condensation -- by direct
pressure, condensation, and expansion. -- The power of engines.
-- The duty of engines. -- Meaning of horse power. -- To compute
the power of an engine. -- Of the power of boilers. -- The
structure of the grate-bars. -- Quantity of water and steam room.
-- Fire surface and flue surface. -- Dimensions of steam pipes.
-- Velocity of piston. -- Economy of fuel. -- Cornish duty
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