bubbler

1939 June, Ella Gardner, Short-Time Camps: A Manual for 4-H Leaders, United States Department of Agriculture, Miscellaneous Publication No. 346, page 11, Plans for an inexpensive bubbler or drinking fountain that have been worked out by the 4-H Club department in Massachusetts are shown in figure 4.

1962 February, Repairs and Utilities: Refrigeration, Air Conditioning, Mechanical Ventilation, and Evaporative Cooling, United States Department of the Army, Technical Manual TM 5-670, page 82, Small self-contained water coolers have a limited capacity of cooled water. They are equipped with one bubbler or drinking fountain and have a capacity of about 5 gallons of cooled water per hour or less.