The Recording Thermometer
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.] |