Photo: Topical
KERR (CHIEF ENGINEER) EXAMINING THE LUCAS DEEP-SEA SOUNDING MACHINE
Hydrometers, for determining the specific gravity of sea-water, which gives a measure of the total salinity.
Sea-thermometers, for determining the surface temperatures of the sea-water.
Marine pattern mercury barometer.
Aneroid barometers, checked daily from the mercury barometer, in case the latter should be broken.
Barograph, to obtain continuous records of the air pressure.
For upper-air work four cylinders of hydrogen and several hundred pilot balloons were taken. (These latter were sent up on many occasions from the ship, but the Quest proved to be so lively that it was impossible to keep them in the field of view of a telescope or even of field-glasses.)
All the instruments were very kindly lent to us by the Meteorological Section of the Air Ministry, and were of standard make and pattern.