228 PRO TECTION FROM 



virulent and very fatal form of the same malady. This, 

 thanks to Jenner, we have been able to do daily, as 

 regards the most loathsome of all contagious diseases, 

 for the last seventy years. Would that I could say there 

 was great hope that we should soon be able to dis- 

 cover as efficient means of protecting ourselves from 

 the ravages of scarlatina, measles, whooping cough, 

 and other scourges, as, by vaccination, we protect our- 

 selves from the ravages of small-pox. But although 

 all attempts to find out how this great object is to be 

 achieved have failed, we may feel sure, not only that 

 this is possible, but that it will be done. In this 

 direction our work should be unremitting. The secret 

 may be found out any day by the sagacity of a 

 Jenner, or it may not be discovered until long series 

 of carefully devised scientific experiments have been 

 performed, and have for years proved so barren of re- 

 sults that persons well versed in knowledge ridicule 

 those who persist in making them, while the public 

 scoffs at the sacrifice of labour, and becomes indignant 

 at what in their eyes is a most unjustifiable waste of 

 money. 



But who would not be struck at the discovery of the 

 fact, if a few animals in a herd were found to be proof 

 against the poison of cattle plague ? And who ac- 

 quainted with such a circumstance would not desire to 

 learn the cause of this immunity from a disease which 

 seizes upon almost every individual animal exposed to 

 its influence ? One cow lived amongst the cattle plaguy 



