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…vessels, or by plunging a long and sharp-pointed knife into the heart and large blood-vessels at a point corresponding to the upper potion of the brisket, and just above the breast-bone.
Failure to fell the animal at the first blow cannot be attributed to any difference in the anatomical structure of the part, but rather to the fact that the blow was ill-directed, almost invariably too low, that it was not sufficiently powerful, or that both of these faults were combined.