e
poisons known and is as effective in dealing with the microscopic
organisms known as bacteria as it is in dealing with the larger animals
for which it has been used for years past,--the destruction of bed-bugs.

For general cleaning purposes, such as scrubbing woodwork, floors, and
walls, it should be used in strength of about 1 part to 3000 parts of
water. This means that for 1 ounce of corrosive sublimate 3000 ounces of
water or 25 gallons must be taken. This solution is very active in its
effect on all metal, so that it must be kept in brassware or
earthenware, and when mixed with the material which it is intended to
disinfect, it must be kept from tin or iron. This solution is also
affected by albuminous material, although this may be counteracted by
the addition of salt. It is a good plan, therefore, to add to the
solution salt at the rate of about 4 teaspoonfuls to each gallon of
solution. On account of the very poisonous action of this solution great
care must be taken to keep it away from children, and it has been
suggested that it is desirable to add some coloring matter to the
liquid, since without this it may be mistaken for clear water.

_Lime for disinfecting._

Chloride of lime is one of the most useful as well as one of the
cheapest disinfectants available. It costs about $25 a ton, although by
the pound this wholesale price would not be obtained. It is effective in
a 1 per cent solution, that is, 1 pound of chloride of lime to 100
pounds or 12 gallons of water. To be effective, the solution must be
well stirred into the organic matter to be disinfected, since it is the
chloride rather than the lime which is the disinfecting agent. Saucers
or soup plates of chloride of lime standing around the room have no
effect upon the germs in the air and on the floor and are of no more
value than sulfur, or roses for that matter. Chloride of lime is
commonly known as bleaching powder, and its effects on clothes or on any
substance which can be eroded is well known. It is, therefore, not a
suitable material for disinfecting towels, because the action is on the
towel as well as on the bacteria, differing in this respect from
mercury, which does not hurt the fiber of clothes.

Milk of lime is produced by slaking ordinary building lime until a fine
white powder is obtained, about an equal quantity of water to the amount
of lime to be slaked being necessary. When the powder has formed and
steam has ceased to be give