On poisons in relation to medical jurisprudence and medicine . injected into the femoral vein of a dog, he was unable, withhis watch in his hand, to notice any appreciable interval between themoment at which it was injected and that in which the animal died.The interval did not exceed three, or at most four, seconds. Prussicacid and strychnia act almost instantaneously under these circumstances.Dr. Fayrer found that when the cobra poison was injected into thejugular vein of an animal, the action of the heart was at once arrested.The heart was not paralyzed, but thrown into a state of tetanic c
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On poisons in relation to medical jurisprudence and medicine . injected into the femoral vein of a dog, he was unable, withhis watch in his hand, to notice any appreciable interval between themoment at which it was injected and that in which the animal died.The interval did not exceed three, or at most four, seconds. Prussicacid and strychnia act almost instantaneously under these circumstances.Dr. Fayrer found that when the cobra poison was injected into thejugular vein of an animal, the action of the heart was at once arrested.The heart was not paralyzed, but thrown into a state of tetanic con-traction from excessive stimulus. I am indebted to Dr. Fayrer for the annexed diagram of the poison- 24 ENTRANCE BY THE SKIN AND CELLULAR MEMBRANE. gland of a -poisonous snake. The gland is incased in a capsule, and ispartially covered by fibres of muscle (the masseter) whose action inclosing the jaw at the same time compresses the gland and squeezes thepoison through the duct into the perforated or grooved fang, whenceit issues at F (see Fig. 1). Fig. 1.. Poison glands, duct and fang in situ. L, lobe of gland ; D, duct; F, fang; GG, gland; M, mucous capsuleof fang; R, reserved fangs ; AA, fascia or membrane covering the glands.