Lung Plague in Cattle. 619 



slaughtered under official supervision and with necropsy of each 

 animal. If any herd has been losing animals, or had sick ani- 

 mals within a year, buy and kill the whole herd. Indemnify 

 the owners to the amount of at least two thirds or three fourths 

 of the sound market value for all except the advanced and acute 

 cases of the disease, and such animals as have been moved into the 

 State less than three months before. These latter may be sacri- 

 ficed without indemnity. Disinfect thoroughly all infected 

 premises and things at public expense. Close the fields against 

 all outside cattle for three months. Burn all hay, straw, litter, 

 and grain in the infected buildings or see that they be fed to 

 horses, sheep or pigs apart from where cattle are kept. Burn or 

 disinfect all manure or have it drawn out and plowed under by 

 horses, and the wagons and implements used in doing so 

 thoroughly disinfected. Allow restocking of the disinfected 

 premises from sound districts only, and keep up the strictest 

 supervision and control of the herds for from three to six months. 



For private Control in the absence of Government Action. The 

 stock-owner in a secluded locality, not bordering on a highway or 

 railway can as a rule secure the immunity of his herd by such 

 measures as the following. Breed all the stock on the farm. If 

 a change of blood is required buy the bull young and keep him 

 strictly by himself for at least four months, allowing him to 

 mingle with other cattle only after he has been thoroughly at- 

 tested. Allow no animals to go outside for service or any other 

 purpose and afterward return to the herd. Allow none to enter 

 from without for any such purpose. If from any cause cattle 

 must be bought, secure them from healthy herds and transport 

 them in thoroughly disinfected cars, boats and by healthy roads, 

 and never through an infected district. Place them in special 

 premises at least one hundred paces from all other cattle, and 

 under special attendants for three months. 



Immunizing through a First Attack. When lung plague was 

 at its worst in Great Britian, Mr. Harvey a dairyman on a large 

 scale in Glasgow practiced the method of buying heifer calves 

 and exposing them in his infected stables until they contracted 

 the disease. He had a loss of 20 per cent, and the surviving 

 80 per cent, were then turned out on his farm and raised and 

 when they came in milk, were sent into Glasgow as new milch 



