320 BUILDINGS, SANITATION, AND DISEASES 



removed, and all adhering filth scraped off the floors, par- 

 titions, and troughs. It is of little use applying a disinfectant 

 on top of a coating of filth which may conceal and protect 

 millions of disease germs. A good spray pump is best for 

 applying the disinfectant, so as to force the liquid into every 

 crack and cranny, and it is not wise to be economical in the 

 use of the disinfectant. Every part of the pen should be 

 thoroughly saturated with the solution. 



If there are small outside yards attached to the piggery, 

 they should be floored with concrete, and then they can be dis- 

 infected in the same way as the interior of the building. If 

 they are not floored it is almost impassible to disinfect them 

 thoroughly, and they are a constant menace to the health of 

 the animals. 



Pasture lots and large paddocks or feed lots are more 

 difiicult to deal with. Liberal liming and plowing up is about 

 all that can be done. In case of some diseases, such as cholera, 

 it is safer to remove the hogs to other feed lots or pastures for 

 at least several months. Of course, the lots could be disinfected 

 by saturating the surface soil with a good disinfectant, but it 

 would be an expensive operation. (Fig. 86.) 



Systematic disinfection of the premises should not be neg- 

 lected even if there is no disease. A small spray pump and a 

 constant supply of disinfectant to be used at frequent intervals 

 about the buildings constitute an important part of the equip- 

 ment of a piggery. At least once a year, a general house- 

 cleaning is advisable, and whitewashing the walls, ceiling, and 

 partitions with lime and crude carbolic acid will go a long 

 way towards keeping the building sanitary. A good pint of 

 crude carbolic acid to three gallons of whitewash will answer 

 the purpose. 



