144 [ASSEAIBLV 



Endorsement of the Hon. Secretary of State. 

 I concur entirely in the foregoing report of the Commissioner 

 of patents, in regard to the great utility and importance of Mr. 

 Jordan L. Motfs invention for burning refuse anthracite coal. 



(Signed) JAMES BUCHANAN. 

 Washington May 8, 1848. 



The evidence confirming that of the subscriber and vrhich led 

 to the report from the Secretary of State, were affidavits kindly 

 furnished by Prof, Ren wick, Dr. James R. Chilton, Gen. Thomas 

 W. Harvey, and other gentlemen of scientific and practical 

 knowledge including those from stove dealers in Boston, Phila- 

 delphia, Albany, New-York, and the person who made his first 

 patterns. 



Prof. Renwick in his affidavit says : 1st. "Mr. Mott, so far as 

 I am able to learn was the first person who successfully used as 



fuel, anthracite coal broken into small fragments" again, 



« 



2d. '• Mr. Mott's apparatus for burning coal of this descrip- 

 tion is not only the first in point of date, but is as far as my ob- 

 servations have reached, the best of all those used for the pur- 

 pose." 



Doct. Chilton, after stating that he had " assisted in making a 

 series of practical experiments to test the value of the improve- 

 ment," says. " By its peculiar construction no doubt that a 

 greater amount of available heat can be obtained for domestic 

 uses from a given weight of coal, than by any other arrange- 

 ment with which I am acquainted." 



The Compound Furnace referred to in the foregoing extract, 

 is the same as that embodied and combined with other most im- 

 portant practical improvements for the application and economy 

 of heat in the stove made by the undersigned called the " In- 

 vincible," and entered on the books and catalolgue of the late 

 Fair of the "American Institute as number one.'''' 



It is the same furnace to which the American Institute award- 

 ed a discretionary premium by the managers of the fair held at 

 Masonic Hall in 1833, in the following words: 



