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Updated: May 28, 2025
In reality, it was not merely colder than fifty below zero; it was colder than sixty below, than seventy below. It was seventy-five below zero. Since the freezing-point is thirty-two above zero, it meant that one hundred and seven degrees of frost obtained. The dog did not know anything about thermometers.
The Cape Meteorological Commission has sent Graham the following instruments with a request that he would take regular observations An aneroid barometer. A Fortin mercurial barometer. Dry and wet bulb hygrometers. A maximum thermometer. A minimum thermometer. A five-inch rain gauge. The hygrometers and thermometers are to be kept in a Stevenson's screen.
The spinning thing atop the tripod made it quite pleasant to be out-of-doors around the Gissell Bay base, though there were forty-mile winds and thermometers read ten below zero two hundred yards from the thing Hod had set up. The cooking-pot boiled merrily without fuel, with an increasingly thick layer of frost on its outside.
Another possible explanation of this curious and beautiful phenomenon will be given hereafter. The temperature was half a degree lower than when there were three of us in the cave two days before. I deposited one of Casella's registering thermometers, on wood, on a stone in that part of the floor which was free from ice, though there was ice all round it at some little distance.
By means of an occasional use of the handy pump, it yielded such a fine steady blowpipe blast, as enabled me to bend glass tubes and blow bulbs for thermometers, to analyse metals or mineral substances, or to do any other work for which intense heat was necessary. But I did not devote myself altogether to experiments. Exercise is as necessary for the body as the mind.
This being ascertained, a table of factors was constructed, in other words, a set of figures contrived, which should, by a multiplication of the subtracted difference between the range of the dry bulb and the wet bulb of the thermometers, furnish the amount of deduction from the former which would indicate the dew-point, or the point to which the mercury in the dry thermometer must fall to show how much more moisture the air could hold without its condensation.
Among other applications of the said invention which may be enumerated, it is particularly advantageous for rendering visible clock or watch faces and other indicators such, for example, as compasses and the scales of barometers or thermometers during the night or in dark places during the night time.
Thermometers at most meteorological stations, when not suspended at points regulated by the mere personal convenience of the observer, are hung from 20 to 40 feet above the ground.
And see," she continued, pointing to one of the thermometers fixed outside the glass dome which covered the upper deck, "it's only sixty-five even here. I wonder if we can breathe this air, and oh I do wonder what we shall see on the other side of those clouds." "You shall have both questions answered in a few minutes," replied Redgrave, going towards the conning-tower.
Another time I ascended a third spur from this great mountain, and was overtaken by a heavy gale and thunderstorm, the latter is a rare phenomenon: it blew down my tripod and instruments which I had thought securely Propped with stones, and the thermometers were broken, but fortunately not the barometer.
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