e for animal diseases are ordinary freshly slaked
lime or unslaked in powder, chlorid of lime, crude carbolic acid, corrosive
sublimate, formaldehyde gas, formalin, and compound cresol solution.

(1) Slaked lime is perhaps the most easily procured, but its disinfecting
power is limited. While it is capable of destroying all bacteria in their
vegetative state, it is unable to destroy such spores as those of anthrax
and blackleg. It is probable, however, that in incrusting spores it may
destroy their vitality sooner or later. It is regarded as safe practice to
use only spore-destroying substances for the virus of those diseases of
which we have no definite knowledge. Nevertheless, in the absence of other
disinfectants, lime is very useful. It may be employed as a whitewash on
wood and stone and sprinkled as a dilute wash or in powder over yards,
manure heaps, and over carcasses before they are buried, and over the
ground on which they have lain to prevent other animals from carrying the
infection away.

(2) Chlorid of lime is more efficient than simple slaked or unslaked lime,
as it destroys spores. It is the ordinary bleaching powder of commerce and
is quite unstable, hence old preparations, unless sealed, are of little
value. A 5 per cent solution is sufficiently strong for all spore-bearing
bacteria (3 ounces in 2 quarts of water). It may be efficiently applied to
the walls and floor of an infected stable by mixing with limewash in the
proportion of 6 ounces of the lime to each gallon of limewash. The ceilings
and those portions of the walls which can not be reached should be
disinfected by means of chlorin gas liberated from the chlorid of lime by
crude carbolic acid. This is accomplished by making a cone of 5 or 6 pounds
of chlorid of lime, in the top of which a deep crater is made for the
placement of from 1 to 2 pints of crude acid. The edge of the crater is
thereupon pushed into the fluid, when a lively reaction follows. The fumes
of chlorin are strongly irritating to the respiratory tract and therefore
all live stock should be removed before the work is started. Owing to the
heat generated, it is advisable to place the lime in an iron crucible and
to have nothing inflammable within a radius of 2 feet. The number and
location of these cones of chlorid of lime depend on the size and structure
of the building to be disinfected. As a rule, it may be stated that chlorin
gas liberated from the above-sized cone will be