5-light dry gas meter
5-light dry gas meter, no.168,435, by W & B Cowan, London & Edinburgh, 1873, with 4 dials, units (calibrated 1-2), hundreds (calibrated 0-9), thousands (calibrated 0-9),ten thousands (calibrated 0-9), of cubic feet.
5-light dry gas meter, no.168,435, by W & B Cowan, London & Edinburgh, 1873, with 4 dials, units (calibrated 1-2), hundreds (calibrated 0-9), thousands (calibrated 0-9),ten thousands (calibrated 0-9), of cubic feet.
