Mechanical Devices in the Home
CHAPTER XLII. GAS, WATER AND ELECTRIC METERS 230
293. Different kinds of meters. 294. Construction of a gas meter. 295. Reading the gas meter. 296. Water meters. 297. Prepayment meters. 298. The electric meter.
Mechanical Devices in the Home
293. Different kinds of meters. 294. Construction of a gas meter. 295. Reading the gas meter. 296. Water meters. 297. Prepayment meters. 298. The electric meter.