The value of a disinfectant varies with the object for, and the manner in, which it is used. For instance, corrosive sublimate is not effective when there are large amounts of albuminous matter present, and sulphur dioxide is unsuitable for fumigation when it would come in contact with metallic decorations.

To disinfect the hands of those in immediate attendance on a patient:

Mercury bichloride solution.................. 1-1000

Phenol solution ............................ 2 1/2%.

Chlorinated lime solution.................... 1 1/2%.

After handling the patient, and always before eating, the nurse in attendance should immerse her hands in one of the above solutions, or something similar, for several minutes. This, of course, is not the method of producing surgical asepsis of the hands.

To disinfect the body use mercury bichloride in 1-1000 solution for sponging, but 1-5000 is strong enough for a full bath. A 2 1/2 per cent, phenol solution may be used for the same purpose.

To disinfect excreta:

Phenol solution ..............................

5%.

Cresol solution ...............................

3%.

Copper sulphate solution ...............................

5%.

Chlorinated lime solution ..............................

3%.

Liquor Formaldehydi .........................

5%.

Corosive sublimate antiseptic tablet ................................

1-500.

When used for faeces, the solid matter must be thoroughly broken up.

To, if possible, confine the germs of a contagious disease to the sick room, a sheet wet in chlorinated lime or phenol solution should be hung at the doorway.

To disinfect a room it should first be made practically air-tight by plugging the windows, keyholes and register openings. All bed clothing and other cloth materials in the room should be spread out over chairs, or hung over lines which have been stretched across the room. Then one or two sheets, depending upon the size of the room, should be hung over lines stretched in the room. Each sheet should then be sprinkled with a quart of Liquor Formaldehydi. This, of course, must be quickly done, as the gas diffuses so rapidly that the operator could not remain in the room. The room should then be closed tightly for twenty-four hours, after which the windows can be thrown open and the room thoroughly ventilated. The woodwork and furniture might be wiped with cloths wet in 1-1000 bichloride of mercury solution.

To disinfect clothing or bedding that can be washed nothing is better than boiling for half an hour in water. Clothing that can be wet, but should not be boiled, may be placed in two per cent, formaldehyde solution or 1-2000 bichloride of mercury solution, neither of which will in-jure the fabric. Clothing that may contain contagious germs should not leave the sickroom, or better, the adjacent bath-room, until bathed for some hours in one of these solutions, even if they are to be subsequently boiled.

Mattresses, comfortables and such articles as cannot be put into water should be disinfected with formaldehyde.