United States Statutes at Large/Volume 5/25th Congress/2nd Session/Chapter 163
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July 7, 1838.
Chap. CLXIII.—An Act supplementary to the act entitled “An act authorizing the appointment of persons to test the usefulness of inventions to improve and render safe the boilers of steam engines against explosions,” approved twenty-eighth day of June, eighteen hundred and thirty-eight.
Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled,Act of June 28, 1838, ch. 147—supplement. That nothing in the act to which this is additional shall be construed to exclude from the consideration and examination of the commissioners, any plan of a steam engine, for propelling boats constructed without a boiler.
Approved, July 7, 1838.