HISTORY OF STEAM
ERIE CANAL.
Screw Propellers from 1858 to 1862 .
Screw-Tugs .
Paddle-wheels and other Devices .
Remarks .
STEAM IN 1871 AND 1872.
Screw Propellers .
Paddle Wheels .
Observe
The trials of Steam in 1872 less Economical than in 1858 to 1862 .
Years 1871 and 1872, as Published .
Relations of Time—Twelve Years Ago and Now .
Steam in 1872 Less Economical than Horses .
Horse-Boat Times .
Conditional Explanations .
Canal Necessities .
Summary .
