. 1 is a back view of the case ready for use. In Fig. 2, a a represent a ring, or collar, on which the thermometer-plate rests, to keep it clear of the lower valve; bb, the upper valve and valve-tube cover ; c c, a bridge on which the neck rod, or journal, of the valve works, through a hole in a swell in the centre of the bridge ; d d, lower part of the journal, with a screw-head, which keeps it from rising through the hole in the bridge; e e, ends of the journals. In recording the Surface Temperature, care should be talsen that the instrument is not affected by the hot water from the condense
. 1 is a back view of the case ready for use. In Fig. 2, a a represent a ring, or collar, on which the thermometer-plate rests, to keep it clear of the lower valve; bb, the upper valve and valve-tube cover ; c c, a bridge on which the neck rod, or journal, of the valve works, through a hole in a swell in the centre of the bridge ; d d, lower part of the journal, with a screw-head, which keeps it from rising through the hole in the bridge; e e, ends of the journals. In recording the Surface Temperature, care should be talsen that the instrument is not affected by the hot water from the condenser, or other causes. If the water be drawn up, time should be given for the receptacle to acquire the same temperature as the sea, and the Thermometer must be read immediately it is taken from the water.
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Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectpilotguides
