ADDENDUM. 



A few remarks regarding the history of this disease in other 

 countries may not be without interest, and we accordingly add, 

 that its origin is very uncertain. Epizootic diseases of the respira- 

 tory organs have raged at various times in Europe for more than a 

 hundred and fifty years past, but the earlier ones, judging from the 

 accounts given, were not identical with the present pleuro pneu- 

 monia. It appears, however, that one exactly analagous to this, 

 has existed for an uncertain length of time in Switzerland, Holland, 

 Germany, and other parts of Europe, and has been attended with 

 great fatality. It appears, also, that this disease was introduced 

 from the continent into Ireland, and that in the spring of 1841 it 

 crossed the Irish Channel into the western part of England, and 

 following the course of the Irish droves, gradually appeared in va- 

 rious directions. Prof Simonds says " it destroyed great numbers 

 of cattle, and not only were the hopes of the farmer blighted, but in 

 many cases it effected his ruin." Mr. McGillavray, V. S., in his 

 essay on Pleuro Pneumonia, published in 1849, says, " The immense 

 value of live stock in Great Britain shows their importance as 

 forming a very large proportion of the national wealth ; moreover, it 

 is stated, on high authority, that the annual loss from disease among 

 our domesticated animals, is about £10,000,000," (fifty millions of 

 dollars,) and adds his own belief in the truth of the statement; 

 and although he does not state the exact proportion of this amount 

 due to pleuro pneumonia alone, we may judge from the connection 

 in which the paragraph appeal's, that he deems it a very considera- 

 ble one. It remains still, both on the continent and in Great Britain, 

 and it is only by the most vigorous sanitary measures, embracing 

 the killing of diseased animals and the complete isolation of all 

 which have been exposed, that it has been kept in check. 



The disease was introduced into South Africa, about six years 

 ago, by a bull from Holland, brought thither to improve the breed. 

 It there spread with great rapidity, there being no enclosures or 

 any adoption of sanitary measures, and was exceedingly fatal, in so 



