By WILLIAM B. TRIMBLE, M. D.
Everyone is more or less familiar with this new remedial agent, yet it may be well to quote here some of its physical characteristics. Liquid air is the common air we breathe, very much reduced in temperature. It liquefies at 312º F. below zero. We can readily understand how cold it must be when we are told that it is about 400º colder than the ordinary atmospheric air.
Some Further Observations on the Treatment of Pigmented Hairy Naevi With Liquid Air; Three Additional Case Reports.. Arch Dermatol. 2007;143(9):1108. doi:10.1001/archderm.143.9.1108