CHAP. xvm. VACCINATION A DELUSION. 307 



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 Com- 

 mission's favorite 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. 250), and 

 leaving no room whatever for the supposed effects of 

 vaccination. 



Diagram III. shows that similar phenomena occurred 

 in England and Wales as a whole, the other zymotics 

 and the total deaths obeying the same laws of increase 

 and decrease as small-pox. Comparison with Diagram 

 I. shows the much greater severity of small-pox epi- 

 demics in London, illustrating the fact, which all the 

 statistical evidence of all countries strikingly enforces, 

 that small-pox mortality is, other things being equal, a 

 function of density of population, while it pays no regard 

 whatever to vaccination. This is further shown by the 

 short, thick dotted line which exhibits the total number 

 of vaccinations since 1872, when private as well as public 

 vaccinations were first officially recorded, and which 

 proves that the continuous decrease of vaccination since 

 1882 has been accompanied by a decided decrease, in- 

 stead of an increase, in small-pox mortality. 



Diagram IV. shows the statistics of mortality in Ire~ 

 land and Scotland from small-pox and certain chosen 

 zymotics, from the tables which were laid before the 

 Commission by the official advocates of vaccination. 



