There shall be maintained in the office of the inspector of weights and measures at least three standard gas meters which have been tested, sealed and certified by the United States Bureau of Standards. The meters so maintained shall be used as standards for the purpose of checking the working provers which are used by said inspector of weights and measures in checking and testing meters used by consumers of gas.
The unit of measure to be employed by the inspector of weights and measures in making the test of meters herein provided for shall be the cubic foot containing 62,321 pounds of rain or distilled water at a temperature of 62 degrees Fahrenheit, and at a barometric pressure of 30 inches.
(Prior code § 187-8)