No. 4.] CATTLE COMMISSIONERS' REPORT. 221 



Sect. 8. Sections twelve and thirteen of chapter two hundred 

 and fifty-two of the acts of the year eighteen hundred and eighty- 

 seven, and section three of chapter one hundred and ninety-five of 

 the acts of the year eighteen hundred and ninety-two are hereby 

 repealed. [^^Approved May 3, 1893. 



Appendix C. 

 TUBERCULOSIS IN CATTLE. 



By Charles P. Lyman, F. R. C V. S. 



[Note. — This paper is publislied solely as an answer to various inquiries coming 

 to tlie Board frona inspectors througliout tlie State ; and, while an endeavor lias 

 been made to treat the several divisions of the suliject in a way that may be clearly 

 understood, it is proper to say, here, that it is not always easy to divest a purely 

 scientific subject of all technicalities ; although an attempt has been made to do so, 

 as far as possible, in this instance. On the other hand, it is desired that the paper 

 shall not I)e considered as being, in any way, an exhaustive treatment of the matter 

 from a professional stand-point. No pretence to make it so has been made, as will 

 readily be seen.] 



It lias been stated that consumption destroys one-sixth of the 

 human race. Consumption and tuberculosis are one and tiic same 

 disease. The same germ that produces tuberculosis in cattle pro- 

 duces consumption in man. The disease is communicable from a 

 diseased man to a healthy animal, and from a diseased animal to 

 a healthy human being. 



The malady is conveyed from an affected animal to mankind 

 through the milk or the meat used as food. It is because of this 

 incontestible but rather recently appreciated fact that so much of 

 an endeavor is now being made to rid the different States and 

 countries of tuberculous cattle. 



Among cattle the disorder rs communicated by contagion, but in 

 order that the contagion may be so communicated, an animal's 

 body must be in a particular and peculiar condition of receptivity. 



Causes. 

 Just how this peculiar condition of body is produced we do not 

 always know, but it seems that when an animal is constantly 

 subjected to a system of treatment that demands a considerable 

 amount of vital force for its accomplishment, she is by that 

 act especially open to an attack of this contagion. Such treat- 

 ment will include, among its most common operations, the frequent 

 bearing of young, and the strong feeding which is undertaken to 



