Co-Operation
A Dictionary of Law · Henry Campbell Black · 1891
A Dictionary of Law
The combined action of numbers. It is of two distinct kinds: (1) Such co-operation as takes place when several persons help each other in the same employment; (2) such co-operation as takes place when several persons help each other in different employments. These may be termed "simple co-operation" and "complex co-operation."
Mill, Pol. Ec. 142.