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Updated: June 28, 2025
"There must be a great deal of nice mechanical work required in St. Petersburg, for on the Nevsky Perspective, the principal street, there were a great many shops in which graduating and measuring instruments of very nice workmanship were for sale. Especially I noticed the excellence of the thermometers, and I naturally stopped to read them.
The observation of maximum and minimum thermometers in three different classes of situation videlicet, in the areas selected for plantation themselves, at places in the immediate neighbourhood of those areas where the external influence might be expected to reach its maximum, and at places distant from those areas where the influence might be expected to be least.
We were prevented, however, from witnessing it by a heavy snow-storm, and the only observation we could then make was to examine whether the temperature of the atmosphere altered during the eclipse, but we found that both the mercurial and spirit thermometers remained steadily at 30° for a quarter of an hour previous to its commencement, during its continuance, and for half an hour subsequent to its termination; we remarked the wind increased very much, and the snow fell in heavier flakes just after the estimated time of its commencement.
This radiation lowers the temperature, and as we look at our frost-bitten thermometers in the early morning after, we do not wonder that the mercury has shrunken to the zero mark or below. But what do the young pines care? This radiation is only from the very surface of the evaporating snow crystals.
I wish I had had a few adherents of this belief at Framheim that winter; they would have gone away with a different opinion. Not that the hours of work were excessively long, the circumstances forbade that. But during those hours the work was brisk. On several previous sledge journeys I had made the experience that thermometers are very fragile things.
It was especially with this object in view that this guessing was instituted. If later on we should be so unlucky as to lose all our thermometers, we should not be entirely at a loss. It may be convenient to mention here that on the southern sledge journey we had four thermometers with us. Observations were taken three times daily, and all four were brought home in undamaged condition.
Supposing that this diversity of appearance depended upon a difference of temperature, I applied the naked bulbs of two delicate thermometers to a covered and uncovered pane; on which I found that the former was three degrees colder than the latter. The air of the chamber, though no fire was kept in it, was at this time eleven and one-half degrees warmer than that without.
Is it not in every one's experience that there are persons with whom chance has thrown us for a few hours, whom we know better, and who know us better, than the friends with whom we have babbled of green fields, thermometers, and dirty pavements for a score of years?
By the latest intelligence from Lieutenant Cameron, dated Ujiji, 28th February, 1874, the mean of many observations for altitude of the Tanganyika Lake taken with mercurial barometer, aneroids, and boiling water thermometers, gives 2,573 feet above the sea-level. The corrected altitude of the Albert N'yanza, taken by me at Vacovia, N. lat. 1 degree 14', March 14, 1864, is 2,720.
"Half a minute," he would say, "I must just put these cigars aside for the gentleman who had the picture post card last year. What have you got there? The country cottage and the complete edition of Meredith? Ah yes, perhaps he'd better have those too." That would be something like a Father Christmas. Thoughts on Thermometers Our thermometer went down to 11 deg. the other night.
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