aid
boiler gives motion to one of those wheels by striking on buckets on its
circumference; on the outer end of the axle of the wheel is a wallower,
the rounds of which fall into the teeth of a second wheel; on the axle of
this second wheel is another wallower, the rounds of which fall into the
teeth of a third wheel; on the axle of which third wheel is a spit: and
praying that a patent may be granted therefor: and, whereas, the said
invention hath been deemed sufficiently useful and important: These are,
therefore, in pursuance of the Act, intitled an Act to promote the
progress of useful arts, to grant the said John Bailey, his heirs,
administrators, or assigns, for the term of fourteen years, the sole and
exclusive right and liberty of constructing, using, and vending to others
to be used, the said invention so far as he the said John Bailey was the
inventor, according to the allegations and suggestions of the said
petition. In Testimony whereof I have caused these Letters to be made
patent, and the Seal of the United States to be hereunto affixed. Given
under my hand, at the City of Philadelphia, this twenty-third day of
February, in the year of our Lord one thousand seven hundred and
ninety-two, and of the Independence of the United States of America the
Sixteenth. Go. WASHINGTON.

By the President,

TH. JEFFERSON.

CITY OF PHILADELPHIA, February 23, 1792.

I do hereby certify that the foregoing Letters-patent were delivered to
me in pursuance of the Act intitled an Act to promote the progress of
useful arts: that I have examined the same, and find them conformable to
the said Act.

EDM. RANDOLPH,

_Attorney-General of the U.S._

[SEAL.]

* * * * *

BRIDGE AT VERONA.

[Illustration: BRIDGE OVER THE RIVER ADIGE, AT VERONA.]

The iron bridge which spans the Adige at Verona, of which we publish
illustrations, has been recently completed to replace an old masonry
bridge built in the fourteenth century, and which was destroyed by the
celebrated flood of 1882. In designing the new work two leading
conditions had to be fulfilled, namely, that there should be a single
opening of 291 ft. between abutments, and that this width should be left
quite unobstructed, for the river is subject to floods, which are
frequent, and very violent and sudden. For this latter reason an ordinary
form of arch, with the roadway above it, was inadmissible, since the
waterway would be seri