those of the earlier period, and can only be compared with it as regards proportions of the different mortalities, not so accurately as to their total amounts. The main teaching of this diagram—a teaching which the Commissioners have altogether missed by never referring to diagrams showing comparative mortalities—is the striking correspondence in average rise and fall of the death-rates of small-pox, of zymotics, and of all diseases together. This correspondence is maintained throughout the whole of the first part, as well as through the whole of the second part, of the diagram; and it proves that small-pox obeys, and always has obeyed, the same law of subservience to general sanitary conditions as the other great groups of allied diseases and the general mortality. Looking at this most instructive diagram, we see at once the absurdity of the claim that the diminution of small-pox in the first quarter of our century was due to the partial and imperfect vaccination of that period. Equally absurd is the allegation that its stationary character from 1842 to 1872, culminating in a huge epidemic, was due to the vaccination then prevailing, though much larger than ever before, not being quite universal—an allegation completely disproved by the fact that the other zymotics as a whole, as well as the general mortality, exhibited strikingly similar decreases followed by equally marked periods of average uniformity or slight increase, to be again followed by a marked decrease. There is here no indication whatever of vaccination having produced the slightest effect on small-pox mortality.
The second diagram shows that, even taking the Commission's favourite method of comparing the zymotics separately with small-pox, all of them except measles show a similar or a greater decrease during the period of official registration, and also agree in the periods of slight increase, again proving the action of the same general causes (which I have pointed out at p. 37), and leaving no room whatever for the supposed effects of vaccination.
