Narrative of a Journey to the Shores of the Polar Sea, in the years 1819-20-21-22, Volume 2 | Page 9

mean for the month was -29°.7. During these intense colds, however, the atmosphere was generally calm, and the wood-cutters and others went about their ordinary occupations without using any extraordinary precautions, yet without feeling any bad effects. They had their rein-deer shirts on, leathern mittens lined with blankets, and furred caps; but none of them used any defence for the face, or needed any. Indeed we have already mentioned that the heat is abstracted most rapidly from the body during strong breezes, and most of those who have perished from cold in this country, have fallen a sacrifice to their being overtaken on a lake or other unsheltered place, by a storm of wind. The intense colds, were, however, detrimental to us in another way. The trees froze to their very centres and became as hard as stones, and more difficult to cut. Some of the axes were broken daily, and by the end of the month we had only one left that was fit for felling trees. By intrusting it only to one of the party who had been bred a carpenter, and who could use it with dexterity, it was fortunately preserved until the arrival of our men with others from Fort Providence.
A thermometer, hung in our bed-room at the distance of sixteen feet from the fire, but exposed to its direct radiation, stood even in the day-time occasionally at 15° below zero, and was observed more than once previous to the kindling of the fire in the morning, to be as low as 40° below zero. On two of these occasions the chronometers 2149 and 2151, which during the night lay under Mr. Hood's and Dr. Richardson's pillows, stopped while they were dressing themselves.
The rapid at the commencement of the river remained open in the severest weather, although it was somewhat contracted in width. Its temperature was 32°, as was the surface of the river opposite the house, about a quarter of a mile lower down, tried at a hole in the ice, through which water was drawn for domestic purposes. The river here was two fathoms and a half deep, and the temperature at its bottom was at least 42° above zero. This fact was ascertained by a spirit thermometer; in which, probably, from some irregularity in the tube, a small portion of the coloured liquor usually remained at 42° when the column was made to descend rapidly. In the present instance the thermometer standing at 47° below zero, with no portion of the fluid in the upper part of the tube, was let down slowly into the water, but drawn cautiously and rapidly up again, when a red drop at +42° indicated that the fluid had risen to that point or above it. At this period the daily visits of the sun were very short, and owing to the obliquity of his rays, afforded us little warmth or light. It is half past eleven before he peeps over a small ridge of hills opposite to the house, and he sinks in the horizon at half past two. On the 28th Mr. Hood, in order to attain an approximation to the quantity of terrestrial refraction, observed the sun's meridian altitude when the thermometer stood at 46° below zero, at the imminent hazard of having his fingers frozen.
He found the sextant had changed its error considerably, and that the glasses had lost their parallelism from the contraction of the brass. In measuring the error he perceived that the diameter of the sun's image was considerably short of twice the semi-diameter; a proof of the uncertainty of celestial observations made during these intense frosts. The results of this and another similar observation are given at the bottom of the page[3].
[3] "The observed meridian altitude of [·0] upper limb was 2° 52' 51". Temperature of the air -45° 5'{2}. By comparing this altitude, corrected by the mean refraction and parallax, with that deduced from the latitude which was observed in autumn, the increase of refraction is found to be 6' 50", the whole refraction, therefore, for the altitude 2° 52' 51" is 21' 49". Admitting that the refraction increases in the same ratio as that of the atmosphere at a mean state of temperature, the horizontal refraction will be 47' 22". But the diameter of the sun measured immediately after the observation, was only 27' 7", which shews an increase of refraction at the lower limb of 3' 29". The horizontal refraction calculated with this difference, and the above-mentioned ratio, is 56' 3", at the temperature -45° 5'. So that in the parallel 68° 42', where if there was no refraction, the sun would be invisible for thirty-four days, his upper limb, with the refraction 56' 3", is, in fact, above the horizon at every noon.
The wind was from