A NEW INSTRUMENT FOR MEASURING TORSION.! 
FRANK RUSSELL. 
THE apparatus that has heretofore been used to measure the 
torsion of the long bones of the human skeleton has been so 
difficult of manipulation as to be impracticable. The following 
description of a simpler apparatus is offered in the hope that 
it may prove useful to those who are interested in statistical 
somatology. 
The base is 7 by 30 inches; it is grooved for a distance of 
14 inches from the middle to within 2 inches of the right end. 
The post A, 8 inches high, is fixed to the base, and has a spur 
projecting 34% inches toward the right. An ordinary brass 
protractor is attached to the top of the post at right angles to 
the spur. (A protractor with the figures reversed in position 
would be better.) The center of the protractor is fixed at the 
axis of the spur, on which is pivoted a U-shaped needle that 
1 Demonstrated at the winter meeting of Section H of the — Associa- 
tion for the Advancement of Science, at Baltimore, Dec. 27, 1900. 
299 
