On the retreat from Prague in 1742, the French army, under the rigorous sky of Bohemia, lost 4000 men in ten days.

It is needless to speak of the thousands lost in Napoleon's campaign in Russia in 1812.
Pinel has remarked that the insane are less liable to the effects of cold than their normal fellows, and mentions the escape of a naked maniac, who, without any visible after-effect, in January, even, when the temperature was -4 degrees F., ran into the snow and gleefully rubbed his body with ice.

In the French journals in 1814 there is the record of the rescue of a naked crazy woman who was found in the Pyrenees, and who had apparently suffered none of the ordinary effects of cold.
Psychologic Effects of Cold .-- Lambert says that the mind acts more quickly in cold weather, and that there has been a notion advanced that the emotion of hatred is much stronger in cold weather, a theory exemplified by the assassination of Paul of Russia, the execution of Charles of England, and that of Louis of France.

Emotions, such as love, bravery, patriotism, etc., together with diverse forms of excitement, seem to augment the ability of the human body to endure cold.
Cold seems to have little effect on the generative function.

In both Sweden, Norway, and other Northern countries the families are as large, if not larger, than in other countries.