This important observation should be kept in mind by those who inject ammonia in serious snakebite cases, and it probably applies likewise to the excessive use of alcohol.
"On Snake-Poison: its Action and its Antidote"
A. Mueller
Something of Jenner's enthusiasm for experiment may be gathered from the fact that he did not hesitate even to inject various materials related to cowpox into the arm of his own children.
"Makers of Modern Medicine"
James J. Walsh
Besides, the rough, jagged edge would hold the material he wished to inject all the better, while its saw-like points would tear the flesh, imperceptibly, but minutely, and so serve his purpose.
"Hilda Wade A Woman With Tenacity Of Purpose"
Grant Allen