1514 CONGRESSIONAL PROCEEDINGS. 
St. Louis Exposition. 
April 15, 1890. 
Act approved to admit free of duty articles from Mexico and other 
American Republics and the Dominion of Canada for the St. Louis 
Exposition in September and October, 1890. 
(Stat., XXXVI, 55.) 
Louisville Exposition. 
June 18, 1890. 
Act approved providing for the relief of the Southern Exposition 
at Louisville from duty on goods consigned to it for exhibition from 
Russia, amounting to $435.91. 
(Stat., XX VI, 162.) 
HEIRS OF JOSEPH HENRY. 
April 2, 1890—Sennte. 
Mr. JoHN SHERMAN introduced bill (S. 3359): 
That the sum of $20,000 be, and the same is hereby, appropriated, out of any mon- 
eys in the Treasury not otherwise appropriated, for payment to the daughters of the 
late Joseph Henry, Secretary of the Smithsonian Institution, for valuable public 
services rendered by said Joseph Henry. 
Mr. Surerman. The bill is accompanied by a very interesting state- 
ment by the daughter of Mr. Henry, formerly chairman of the Light- 
House Board, setting out the savings he had made and the claim for 
this compensation. I ask that the papers be printed as a document. 
The bill will be printed, of course, in the ordinary way, and I ask 
that the papers accompanying it be printed as a document and referred, 
with the bill, to the Committee on Finance. As the services per- 
formed relate to the Treasury Department, I suppose that will be the 
proper reference. 
[STATEMENT. | 
The undersigned, Mary A. Henry, administratrix of Joseph Henry, deceased, late 
member and chairman of the Light-House Board, respectfully represents that Pro- 
fessor Henry served the Board without compensation from October 9, 1852, until his 
death, May 3, 1878, twenty-five years and eight months. 
The value of the original investigations of Professor Henry in the service of the 
Light-House Board can not be estimated, but a statement of the saving to the Goy- 
ernment from two series of his experiments, which resulted the one in the introduc- 
tion of lard oil, the other of sperm as an illuminant, may give some idea of what the 
Light-House Establishment owes to him, a saving which, from 1867 up to the present 
time, has amounted to over $4,000,000. 
The oil in use by the Light-House Board was sperm. It was proposed on account 
of cheapness to use lard, but the committee to whom the matter was referred reported 
unfavorably, on the grounds that the lard oil did not mount as easily the wicks, and 
did not flow as easily as the sperm. Not content with this decision, Joseph Henry 
instituted a series of experiments, which resulted in the demonstration that while 
this was the case at a certain temperature, at a higher temperature the contrary was 
the case, the lard flowed more easily and mounted more easily the wicks. He then 
devised a lamp by which the oil was heated by the lamp itself before it was used by 
