466 Joseph Henry. 
Ona bell signal from the Professor, Sam would saw away with 
his bow in the cellar, the Professor calling the attention of the 
class to the weird music his fiddle discoursed in the lecture- 
room. On these occasions Professor Henr always remarked 
To the above enumerated papers should be added an impor- 
tant series of communications, made chiefly to the National 
Academy of Sciences during the past four or five years, upon 
the laws of acoustics as developed in the course of investiga- 
fog-signals. These investigations have been carried forward 
close personal attention during many weeks of each season. 
? 
of electricity, as exhibited in the thunder-storm. 
_ Professor Henry remained at Princeton, in the chair of Nat- 
ural phectiag sa until his removal to Washington in 1846, to 
e duties of Secretary of the Smithsonian Institu- 
Favored by nature with a vigorous constitution, he enjoy ed 
__ through his long life. almost uninterrupted good health. His 
cial labor which fell to his share as the head of the Smithson- 
ian Institution ; of the Light-House Board; of the National 
oe 
