1. Animals in which experimental myocarditis has been produced and winch are infused with sodium chloride solutions show a marked decrease in the amount of the secretion of urine. This decrease is even more pronounced than that produced when calcium chloride is added to sodium chloride solution. The intestinal fluid which is markedly decreased, and the peritoneal transudate which is increased by calcium chloride are, on the other hand, not markedly influenced by myocarditic lesions. We may, therefore, conclude that calcium chloride does not exert its specific effect on the quantity of peritoneal fluid through a lowering of blood pressure.

2. Each of the three factors, namely, calcium chloride, adrenalin and myocarditic lesions affects the elimination of fluid through the kidneys, through the mucosa of the small intestine and through the endothelial lining of the peritoneal cavity in a specific way. The conditions influencing the elimination of fluids through these three surfaces seem, therefore, to be different in each case and characteristic for the cells lining these surfaces.

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