226 THE DISEASES AND DISORDERS OF THE OX. 



tubercle-bacilli seem to have a greater resisting power to ozone 

 than anthrax-bacilli ; and though ozone has not been shown to 

 destroy the tubercle-bacilli, it seems to have retarded their growth 

 and to have diminished their virulency. These experiments 

 might well be extended. 



In the case of an ox afflicted with a mild attack of tuberculosis, 

 the best course is perhaps to fatten and then slaughter. In the 

 case of cows it is well to cease milking, to give fattening food, 

 such as oil-cake and good hay, and to avoid grasses and roots, 

 as these are more difficult to digest. If there are scrofulous 

 glands which are ulcerating, they should be dressed with some 

 antiseptic, such as a mixture of carbolic acid and chalk. 



It has long been known that a warm and equable climate is 

 favourable to patients suflfering from this disease. Men who are 

 tainted with it, and who could not live in England, will survive 

 for years at the Cape or in South America, for instance near 

 Buenos Ay res. Arguing from the experiments spoken of above, 

 small doses of perchloride of mercury, prescribed most carefully 

 by the experienced physician, are indicated. A sea voyage, or 

 even the supply of ozone in the house, together with plenty of 

 sleep, a nourishing diet, combined in certain cases, and if 

 necessary, with small doses of alcoholic stimulants, are to be 

 enjoined. 



The Contagiousness of Tuberculosis. — Rabbits, guinea- 

 pigs, calves and young cattle, pigs, sheep, goats, and a porpoise 

 have all been subjected to tuberculosis by feeding on tubercular 

 matter from the ox. Inoculations on flesh-eating animals with 

 tubercular matter as a rule give negative results, but the dog 

 has been inoculated with tubercular matter obtained from man. 

 Feeding carnivorous animals, such as the cat and dog, on 

 tubercular matter from the ox has no effect, probably because 

 they have been accustomed for long ages to feed on all kinds of 

 flesh, and their systems have become capable of resisting the 

 action of various kinds of bacilli, not unfrequently met with in 

 their food, perhaps as a result of that natural law of which we 

 have heard so much, survival of the fittest. Probably this 

 statement may hereafter require modification, for Klebs has 

 accidentally produced the disease in a dog by giving it the milk 

 from a cow in the last stage of the malady. 



As we have implied, tuberculosis may spread from one animal 



