Fig. 96. The Registering Hygrometer.
Fig. 97. The Recording Thermometer.
In [Figure 97] is shown the Recording Thermometer for observing and recording the temperatures within a dry kiln, and thus obtaining a check upon its operation. This instrument is constructed to record automatically, upon a circular chart, the temperatures prevailing within the drying room at all times of the day and night, and serves not only as a means of keeping an accurate record of the operation of the dry kiln, but as a valuable check upon the attendant in charge of the drying process.
| Fig. 98. The Registering Thermometer. | Fig. 99. The Recording Steam-Pressure Gauge.] |
The Registering Thermometer
In [Figure 98] is shown the Registering Thermometer, which is a less expensive instrument than that shown in [Figure 97], but by its use the maximum and minimum temperatures in the drying room during a given period can be determined.
The Recording Steam Gauge
In [Figure 99] is shown the Recording Steam Pressure Gauge, which is used for accurately recording the steam pressures kept in the boilers. This instrument may be mounted near the boilers, or may be located at any distance necessary, giving a true and accurate record of the fluctuations of the steam pressure that may take place within the boilers, and is a check upon both the day and night boiler firemen.