any who should be disposed to construct the
apparatus on a large scale. We have recently given a description of
Mr. Spencer's plan for elevating vessels, and some other modes have
been recently projected, which we may describe in a future number.

* * * * *

INFORMATION TO PERSONS HAVING BUSINESS TO
TRANSACT AT THE PATENT OFFICE.

SEC. 1. The existing laws relating to patents are those approved July
4, 1836, March 3, 1837, and March 3, 1839; all former acts having been
repealed by the act of 1836.

SEC. 2. "Patents are granted for any new and useful art, machine,
manufacture, or composition of matter, or any new and useful
improvement on any art, machine, manufacture, or composition of
matter, not known or used by others before his or their discovery or
invention thereof, and not, at the time of his application for a
patent, in public use, or on sale, with his or their consent, or
allowance, as the inventor or discoverer." Act of 1836, section 6. "No
patent shall be held to be invalid by reason of the purchase, sale, or
use [of the invention,] prior to the application for a patent as
aforesaid, except on proof of abandonment of such invention to the
public, or that such purchase, sale or public use, has been for more
than two years prior to such application for a patent."--Act of March
3, 1839.

SEC. 3. The term for which a patent is granted, is fourteen years; but
it may, under certain circumstances, be renewed for seven years, as
hereinafter mentioned.

SEC. 4. Patents are granted to citizens of the United States, to
aliens who shall have been resident in the United States one year
preceding, and shall have made oath of their intention to become
citizens thereof, and also to foreigners who are inventors or
discoverers.

SEC. 5. A patent may be taken out by the inventor in a foreign
country, without affecting his right to a patent in the United States,
provided the invention has not been introduced into public and common
use in the United States prior to the application for such patent. In
every such case the patent is limited to fourteen years from the date
of the foreign letter patent. A patent is not granted upon
introduction of a new invention from a foreign country, unless the
person who introduced it be the inventor or discoverer. If an alien
neglects to put and continue on sale the invention in the United
States, to the public, on reasonable terms, for eighteen mo