Page:Treatise on poisons in relation to medical jurisprudence, physiology, and the practice of physic (IA treatiseonpoison00chriuoft).pdf/749

 workman who was also present, escaped by a window; but was nevertheless immediately attacked with swelling of the belly, which speedily became very great, and was attended with pain in the jaws, and dimness of sight. These symptoms were very slowly dissipated under the use of cold bathing and purgatives, which brought away an enormous quantity of fetid gas.

These are not the only examples of compound poisoning which have come under my attention. But others I have noticed are not detailed with sufficient exactness to make it worth while to quote them. The instances given, however, are sufficient to show that poisons of opposite qualities given about the same time in large doses will disguise one another's effects, or impede, or perhaps even prevent them, in a manner which renders such a combination of circumstances an important subject of inquiry for the medico-legal toxicologist.

It is probable that the modifying influence is established in one of two ways,—either by one poison producing a state of venous plethora or distension, which impedes, or for a time prevents, the absorption of the other,—or by one poison producing an insensibility of the membrane with which the other is in contact; so that not only the local injury actually done has not the usual remote effect on the constitution, or on distant organs, but likewise is at times substantially less extensive than in ordinary circumstances. These reflexions arise naturally from a review of the preceding cases; but of course farther facts are necessary to give them weight.