192 A. 8. Kimball—Journal Friction at Low Speeds. 
Art. XXV.—On Journal Friction at Low Speeds; by A. S 
KIMBALL, Professor of Physics in the Worcester Free In- 
stitute. 
experiments consisted of—Ist. A pair of cone pulleys giving 
i the work shop. 
w 
with a pulley by which it was driven. The journals on this 
shaft were seven-eighths of an inch in diameter; they revolved 
in cast iron boxes three and .one-half inches long, truly bored 
and polished. A thin cut was planed from the upper half of 
each box, so that when resting upon its journals it was not 
quite in contact with the lower half Above each box was 4 
lever of the second class, by means of which it was possible to 
apply any desired pressure to the revolving journals. The 
