engine to both carriages and boats, and the reader will see that the
date of the demonstration was three years before Fulton moved a boat
by means of Watt's low pressure steam engine. The machine used
involved the original double acting high pressure steam engine, the
original steam locomotive, and the original high pressure steamboat.
The whole mass weighed over twenty tons.

Notwithstanding there was no railway, except a temporary one laid over
a slough in the path, Mr. Evans' engine moved this great weight with
ease from the southeast corner of Ninth and Market streets, in the
city of Philadelphia, one and a half miles, to the River Schuylkill.
There the machine was launched into the river, and the land wheels
being taken off and a paddle wheel attached to the stern and connected
with the engine, the now steamboat sped away down the river until it
emptied into the Delaware, whence it turned upward until it reached
Philadelphia. Although this strange craft was square both at bow and
stern, it nevertheless passed all the up-bound ships and other sailing
vessels in the river, the wind being to them ahead. The writer repeats
that this thorough demonstration by Oliver Evans of the possibility of
navigation by steam was made three years before Fulton. But for more
than a quarter of a century prior to this demonstration Mr. Evans had
time and again asserted that vessels could be thus navigated. He did
not contend with John Fitch, but on the contrary tried to aid him and
advised him to use other means than oars to propel his boat. But Fitch
was wedded to his own methods. In 1805 Mr. Evans published a book on
the steam engine, mainly devoted to his form thereof. In this book he
gives directions how to propel boats by means of his engine against
the current of the Mississippi. Prior to this publication he
associated himself with some citizens of Kentucky--one of whom was the
grandfather of the present Gen. Chauncey McKeever, United States