y,
in so large a town, of experiments performed on persons known to the
observers.--ED.

NEW MOTIVE-POWER.

We copy the following from an American newspaper, without vouching for
the accuracy of the statement:--'The _Cincinnati Atlas_ announces a
wonderful invention in that city. Mr Solomon, a native of Prussia, is
the inventor. He is a gentleman of education, and was professor of a
college in his native land at the age of twenty-five. In Cincinnati,
he prosecuted his scientific researches and experiments, which now
promise to result in fame, wealth, and honour to himself, and
incalculable benefit to the whole human family. The invention of a new
locomotive and propelling power by Mr Solomon was mentioned some six
months ago; and a few days ago, his new engine, in course of
construction for many months, was tested, and the most sanguine
expectations of the inventor more than realised. The _Atlas_ says: "On
Monday last, the engine was kept in operation during the day, and
hundreds of spectators witnessed and were astonished at its success.
The motive-power is obtained by the generation and expansion, by heat,
of carbonic acid gas. Common whiting, sulphuric acid, and water, are
used in generating this gas, and the 'boiler' in which these component
parts are held, is similar in shape and size to a common bomb-shell. A
small furnace, with a handful of ignited charcoal, furnishes the
requisite heat for propelling this engine of 25 horsepower. The
relative power of steam and carbonic acid is thus stated:--Water at
the boiling-point gives a pressure of 15 pounds to the square inch.
With the addition of 30 degrees of heat, the power is double, giving
30 pounds; and so on, doubling with every additional 30 degrees of
heat, until we have 4840 pounds under a heat of 452 degrees--a heat
which no engine can endure. But with the carbon, 20 degrees of heat
above the boiling-point give 1080 pounds; 40 degrees give 2160 pounds;
80 degrees, 4320 pounds; that is, 480 pounds greater power with this
gas, than 451 degrees of heat give by converting water into steam! Not
only does this invention multiply power indefinitely, but it reduces
the expense to a mere nominal amount. The item of fuel for a
first-class steamer, between Cincinnati and New Orleans, going and
returning, is between 1000 and 1200 dollars, whereas 5 dollars will
furnish the material for propelling the boat the same distance by
carbon. Attached to the new engine i