. Industrial gas CHANGE-OVERFUNNEL Fig. 8.—Arrangement for calibrating gas meters by the aspirator bottle method The observations are made as follows: The apparatus is allowedto stand with the gas pressure on and with the lower stopcock, A,closed until it is evident that there are neither leaks nor absorptionof gas by the water. With the change-over funnel set to allowthe water to run to the waste bucket, the stopcock, A, is the index of the meter passes through the zero position thechange-over funnel is shifted to allow the water to run into the Industrial Gas Calorime
. Industrial gas CHANGE-OVERFUNNEL Fig. 8.—Arrangement for calibrating gas meters by the aspirator bottle method The observations are made as follows: The apparatus is allowedto stand with the gas pressure on and with the lower stopcock, A,closed until it is evident that there are neither leaks nor absorptionof gas by the water. With the change-over funnel set to allowthe water to run to the waste bucket, the stopcock, A, is the index of the meter passes through the zero position thechange-over funnel is shifted to allow the water to run into the Industrial Gas Calorimetry 37 weighing bucket. After the index of the meter has made thedesired number of revolutions, the funnel is shifted back just asthe index passes through the zero position. The stopcock, A, isthen closed. The volume of gas delivered is calculated from theweight of the water displaced. A sample observation showingthe method of reduction is given in Table 7. To refill the bottle with water the siphon tube is connected tothe m
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