1671 Inventory in (1991) 34 One watring tubb.
1790 c. 17 §20 Previous to any..Watering Tub or Trough, Pump, Stall, or other Projection, being taken down,..Notice..shall be given.
1949 May 6/2 Just then a slim young boy came up to the watering tub, closely trailed by the huge bulk of an elephant.