DISINFECTANTS. ANTISEPTICS 201 



and unloading same, and wash them until clean, and saturate the entire sur- 

 face of the decks, stalls, or other parts of the boat occupied or traversed by 

 the cattle, or with which they may have come in contact or which have con- 

 tained litter or manure, with the disinfecting material." 



Yards, pens, chutes, and alleyways used by cattle from the quarantined 

 area must be cleaned and disinfected as follows: "Empty all troughs, racks, 

 or other feeding or watering facilities and wash them until clean; remove all 

 litter and manure from the floors, posts, or other parts and wash them until 

 clean, and saturate the entire surface of the fencing, troughs, chutes, floors, 

 walls, and other parts with the disinfecting material. 



"As materials for the disinfection of cars, boats, pens, chutes, and alley- 

 ways which have contained cattle of the quarantined area one of those indi- 

 cated below shall be used. (1) A mixture made with not more than 1 Yi pounds 

 of lime and J4 pound of pure carbolic acid to each gallon of water. In lieu of 

 the pure carbolic acid required to make this solution a proper quantity of so- 

 called ' crude carbolic acid' of known strength (but not less than 25 per cent, 

 pure) may be used, eufiicient to make a disinfecting solution containing 5 per 

 cent, of the pure acid. (2) Any coal-tar creosote dip permitted in the oSicial 

 dipping of sheep for scabies, provided the same is used at one-fifth the 

 maximum dilution (five times the minimum strength) specified for dipping 

 sheep. 



"The litter and manure removed from cars, boats, or other vehicles, and 

 from pens, chutes, alleyways, or other premises or inclosures which have 

 contained cattle of the quarantined area, shall not be so located or stored 

 that they come in contact with cattle in course of interstate transportation 

 unless disinfected by one of the methods specified below. (1) It may be 

 disinfected by saturating it with any disinfecting material specified in the 

 preceding paragraph of the strength and composition indicated therein, 

 except that the Ume may be omitted. (2) It may be stored without disinfec- 

 tion during the period from February 1 to October 31, inclusive, of each year; 

 when stored as above indicated, the storage space shall be tightly inclosed and 

 80 situated or so surrounded by cattle-proof fences or other structures that 

 no cattle other than cattle of the quarantined area may approach closer to it 

 than 15 feet."] 



II. THE MOST IMPORTANT DISINFECTANTS FOR ANIMAL 

 INFECTIONS 



Calx. — Lime. Freshly slaked lime (caustic lime) is a good and 

 easily prepared disinfectant for spore-free bacteria. It is also the 

 cheapest disinfectant. Anthrax spores and tubercle bacilli are, 

 however, not killed by lime. It is used in the form of a powder, 



