The location of the little pure air which the _yurt_ afforded made the boyish feat of standing upon one's head a very desirable accomplishment; and as the pungent smoke filled my eyes to the exclusion of everything else except tears, I suggested to Dodd that he reverse the respective positions of his head and feet, and try it--he would escape the smoke and sparks from the fire, and at the same time obtain a new and curious optical effect. With the sneer of contempt which always met even my most valuable suggestions, he replied that I might try my own experiments, and throwing himself down at full length on the ground, he engaged in the interesting diversion of making faces at a Korak baby. Viushin's time, as soon as his eyes recovered a little from the effects of the smoke, was about equally divided between preparations for our evening meal, and revengeful blows at the stray dogs which ventured in his vicinity; while the Major, who was probably the most usefully employed member of the party, negotiated for the exclusive possession of a _polog_. The temperature of a Korak tent in winter seldom ranges above 20° or 25° Fahr., and as constant exposure to such a degree of cold would be at least very disagreeable, the Koraks construct around the inner circumference of the tent small, nearly air-tight apartments called _pologs_, which are separated one from another by skin curtains, and combine the advantages of exclusiveness with the desirable luxury of greater warmth. These _pologs_ are about four feet in height, and six or eight feet in width and length. They are made of the heaviest furs sewn carefully together to exclude the air, and are warmed and lighted by a burning fragment of moss floating in a wooden bowl of seal oil. The law of compensation, however, which pervades all Nature, makes itself felt even in the _pologs_ of a Korak _yurt_, and for the greater degree of warmth is exacted the penalty of a closer, smokier atmosphere. The flaming wick of the lamp, which floats like a tiny burning ship in a miniature lake of rancid grease, absorbs the vital air of the _polog_, and returns it in the shape of carbonic acid gas, oily smoke, and sickening odours. In defiance, however, of all the known laws of hygiene, this vitiated atmosphere seems to be healthful; or, to state the case negatively, there is no evidence to prove its unhealthfulness. The Korak women, who spend almost the whole of their time in these _pologs_, live generally to an advanced age, and except a noticeable tendency to angular outlines, and skinniness, there is nothing to distinguish them physically from the old women of other countries. It was not without what I supposed to be a well-founded apprehension of suffocation, that I slept for the first time in a Korak _yurt_; but my uneasiness proved to be entirely groundless, and gradually wore away. [Illustration: A MAN OF THE WANDERING KORAKS]