A fair example of one of these old-time objections against vaccination may be found in the following passage from a letter by Dr. Jenner written to Mr. Moore. Corresponding objections have been made in much more modern times, and the passage will arouse the sympathetic amusement of present-day physicians: "You probably may not have seen a pamphlet lately published by Dr. Watt of Glasgow, as there is nothing in its title that develops its purport or evil tendency: 'An Inquiry into the Relative Mortality of the Principal Diseases of {102} Children,' &c. The measles, it seems, have been extremely fatal in the city of Glasgow for the last four or five years among children, and during this period vaccination was practised almost universally. Previously to this, the measles was considered as a mild disease. Hence Dr. Watt infers that the smallpox is a kind of preparative for the measles, rendering the disease more mild. In short, he says, or seems to say, that we have gained nothing by the introduction of the cow-pox; for that the measles and small-pox have now changed places with regard to their fatal tendency. Is not this very shocking? Here is a new and unexpected twig shot forth for the sinking anti-vaccinist to cling to. But mark me--should this absurdity of Mr. Watt take possession of the minds of the people, I am already prepared with the means of destroying its effects, having instituted an inquiry through this populous town and the circumjacent villages, where, on the smallest computation, 20,000 children must have been vaccinated in the course of the last twelve years by myself and others. Now it appears that, during this period, there has been no such occurrence as a fatal epidemic of measles. You would greatly oblige me in making this communication to the Board, with my respectful compliments."