FOOT-ROT. 



467 



when introduced into the system by inoculation, and probably when 

 taken in by the mouth from contaminated pastures. 



2. That it cannot be produced by long-continued exposure to 

 undraiiied, moist soils, with an abundant, coarse and wet herbage. 



3. That animals exposed to these conditions for many months, 

 and resisting entirely the influences named above, contract foot 



FIG. 191. -DISTORTION OF HOOK is AN ADVANCED FORM OF FOOT-BOT (Bno 



in from fourteen to twenty-one days on being placed among sheep 

 .suffering from the disease. 



4 That sheep affected with foot-rot may improve, a 

 time to time become worse; and finally may recover and ,,n 

 perfectly healthy condition of foot, notwitl.t.u.Un, that 

 been kept the whole period under the conditions irhkh in,h, 

 disease. 



