Organic and functional nervous diseases; a text-book of neurology . ines can be mitigatedby large doses of bismuth and oxalate of cerium. The burning sensa-tions of the skin can be benefited by powders and by oxide of zincointment, but the course of the skin disease does not appear to beinfluenced by local treatment. The nervous symptoms may be miti-gated by the use of bromides and coal tar products. CHAPTER XXXIX. CAISSON DISEASE. Etiology. — Persons who have worked in caissons or in deep minesunder high atmospheric pressure, or under the sea in divers garmentsunder high atmospheric pressure,
Organic and functional nervous diseases; a text-book of neurology . ines can be mitigatedby large doses of bismuth and oxalate of cerium. The burning sensa-tions of the skin can be benefited by powders and by oxide of zincointment, but the course of the skin disease does not appear to beinfluenced by local treatment. The nervous symptoms may be miti-gated by the use of bromides and coal tar products. CHAPTER XXXIX. CAISSON DISEASE. Etiology. — Persons who have worked in caissons or in deep minesunder high atmospheric pressure, or under the sea in divers garmentsunder high atmospheric pressure, are occasionally seized with paralysison coming out into the ordinary air. This paralysis has, therefore,been ascribed to the sudden change of atmospheric pressure, it beingsupposed that the system accustoms itself to a very much increasedpressure — say of four to six atmospheres — without difficulty, but thatthe sudden removal of this is the cause of the paralysis. Hence, at thepresent time, where individuals have to work subjected to such pres- FiG. Caisson Disease. Air bubbles in the veins of tlie brain. (Larkin.) sures provision is usually made to remove this pressure very modern mines and caissons have several intermediate chambersin which the workmen are advised to remain for one hour or more,thus accustoming themselves gradually to the ordinary atmosphere,and if this precaution is observed no ill results follow. It has been found that ordinary healthy men of good habits are verymuch less liable to the disease than men who indulge in alcohol freely, orwho have some form of heart or kidney disease, or who are very gradually become accustomed to endure pressure, and hencethere is a greater danger for new hands than for the older workmen, 701 702 CAISSON DISEASE. Pathology. — A remarkable condition of air embolism in the veinsand capillaries of the brain and spinal cord has been found as theprimary lesion in these cases. The sudden r
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