The Collaborative International Dictionary of English v.0.48:

Pesage \Pes"age\, n. [F., fr. peser to weigh.]
   A fee, or toll, paid for the weighing of merchandise.
   [1913 Webster]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

PESAGE, mer. law. In England a toll bearing this name is charged for
weighing avoirdupois goods other than wool. 2 Chit. Com. Law. 16.