In Siberia the Russian soldiers cover their noses and ears with greased paper to protect them against the cold.

The Laplanders and Samoiedes, to avoid the dermal lesions caused by cold (possibly augmented by the friction of the wind and beating of snow), anoint their skins with rancid fish oil, and are able to endure temperatures as low as -40 degrees F.In the retreat of the 10,000 Xenophon ordered all his soldiers to grease the parts exposed to the air.
Effects of Working in Compressed Air .-- According to a writer in Cassier's Magazine, the highest working pressures recorded have been close to 50 pounds per square inch, but with extreme care in the selection of men, and corresponding care on the part of the men, it is very probable that this limit may be considerably exceeded.

Under average conditions the top limit may be placed at about 45 pounds, the time of working, according to conditions, varying from four to six hours per shift.

In the cases in which higher pressures might be used, the shifts for the men should be restricted to two of two hours each, separated by a considerable interval.

As an example of heavy pressure work under favorable conditions as to ventilation, without very bad effects on the men, Messrs.