Trinitrotoluene (TNT) and Heinz bodies in Erythrocytes of Frog and Cock

1. By adding TNT to frog's blood in vitro, certain Heinz bodies would be seen within the erythrocytes, though very few. 2. In case a cock has been reduced to a chronic TNT poisoning, the number of erythrocytes as well as the value of hemoglobin in % would prove a decrease as the degree of poisoning progresses; Heinz bodies appear though slightly within but in the periphery of the erythrocytes.