hould these be poured out
in the neighborhood of springs or wells. Towels, handkerchiefs, and
clothing that comes in contact with the patient should be thoroughly
disinfected before being sent to the laundry. This is best accomplished
by thorough boiling, but in cases where this can not be at once carried
out, it is advisable to use some chemical antiseptic; of these, perhaps
the best is creo-carboline, which may be employed in a 1-500 solution in
water; where this solution is not obtainable, a 5-per-cent. solution of
carbolic acid in water will answer. It should also be remembered that the
water in which typhoid-fever patients are bathed necessarily becomes
infected, and this should always be thoroughly disinfected before being
emptied. These precautions should be carried out for some time after the
patient has recovered, as it is well known that persons, under such
circumstances, for some time frequently contain the poison in their
evacuations.

After the patient recovers, the room should be disinfected with
formaldehyde gas obtained from the substance known as "formalin."
This gas may now be obtained from the formalin without the use of
heat in the following manner: When everything is ready, and the
room properly sealed, thirteen ounces of permanganate of potash to
each quart of formalin are placed in a large vessel, the room being
closed immediately after the two substances are put together; it is
important that the permanganate be placed in the vessel first. When
this method is employed a quart of formalin should be used to each
one thousand cubic feet of air-space in the room. As the gas, by
this process, comes off with great rapidity, it is not necessary
to keep the room closed more than about four hours. This method is
to be advised for the reasons that it acts more quickly than the
older one, and there is never danger of fire.

In cases where houses are too open to permit of disinfection by
means of gas, the sick chamber should be thoroughly washed with a
solution of corrosive sublimate, carbolic acid or some other good
disinfectant.

HOOK-WORM DISEASE.

It has been only recently recognized that a large percentage of the
invalidism and a great number of the deaths yearly in the southern
portion of the United States are caused by a very small intestinal
parasite known as the _Necator americanus_, or hook-worm. This pa