The following quotations from Professor Liebig, in his work on "Organic Chemistry," sufficiently prove the correctness of this position:--"It is only in those parts of the body to which arterial blood, and, with it, the oxygen absorbed in respiration, is conveyed, that heat is produced. Hair, wool, or feathers, do not possess an elevated temperature. This high temperature of the animal body, or, as it may be called, disengagement of heat, is uniformly, and under all circumstances, the result of the combination of a combustible substance with oxygen. In whatever way carbon may combine with oxygen, the act of combination cannot take place without the disengagement of heat. We can no longer doubt that gases of every kind, whether soluble or insoluble in water, possess the property of permeating animal tissues, as water penetrates unsized paper." Does not the action of medicines containing so large a portion of carbon, which can be brought into contact with the whole external surface of the body, and thereby capable of being easily disengaged, suggest a method of relieving pulmonary disease likely to be attended with no ordinary success, by calling into greater activity the action of the skin, and thereby materially lightening the labour of the lungs? Are we not the more encouraged to expect such remedial influence in diseases of the lungs, from the fact of its great power in removing indurated glands, which are so common accompaniments of consumption? There can be no doubt of the usefulness of bisulphuret of carbon in skin diseases. I have submitted these observations under the conviction that they embody principles which may be carried out, and made of great utility to mankind. I am, Sir, your obedient servant, A. TURNBULL, M.D. 48, Russell Square, Oct. 20, 1842. A few weeks after the appearance of the above (Nov. 8, 1842), I wrote to the Editor of the _Literary Gazette_ as follows:-- REMARKS ON THE ACTION OF CARBON, ETC. (_To the Editor of the_ "Literary Gazette.") 48, Russell Square, Nov. 8, 1842.