A payment reserved by tbe grantor of a patent lease of a mlne, or slmil-ar rlght, and payable proportionately to the use made of the right by the grantee. Bee Raynolds ▼. Hanna (C. 0.) 55 Fed. 800; Hubenthal v. Kennedy, 76 Iowa, 707, 39 N
Source: Black's Law Dictionary 2nd Ed (1910)
