Variable. Mathematical term,
Running, Theodore Rudolph, 1866- **E 5126.95 Empirical formulas. Ist edition. — New York. John Wiley & Sons, Inc. 1917. 144 pp. Charts. [Mathematical monographs. No. 19.] 23cm. For determining the value of one of two variables from that of the other.
 
This card was printed at the Boston Public Library, February 25, 1918.
L3615 — S.r. — Variable. Mathematical term. — Formulas. Empirical.