IT DISCHARGES A MORE CONDENSED COLUMN.
It is apparent to the man of chemical science, if not to the common observer, that water, in
the form of spray, thrown into an intense flame, is instantly decomposed, and, instead of
diminishing, increases its fury. The advantage of the Rotative herein, as before observed,
consists in dispensing with the air-vessel. In the old machine it is indispensable. Yet,
notwithstanding its use and importance to them, it constantly imparts a portion of air to the
water discharged, and thus far produces the evil complained of.
Hence it is evident, that the following are among the most material advantages of Cooper's
Rotative Fire Engine, over all others hitherto invented, viz:
They are more simple in their construction, more durable, and less liable to get out of order.
The number of hands necessary to work them does not exceed one half.
They are proof, with proper care, against the effects of frost.
The column of water is more condensed, and consequently strikes with more effect.
And last, though not least in the estimation of the wise and prudent, they can be furnished
for half the expence.
