along the same lines as before with the same
object in view. But with the coming of the regulars the work was more
systematically and thoroughly done. Every case of fever was treated as
though it was yellow fever and every precaution taken to prevent
mosquitoes from biting such a patient. The houses in which the fever
occurred were thoroughly fumigated to kill any mosquitoes that might be
there, and the neighborhood was thoroughly searched to find any places
where the mosquitoes might be breeding. So confident were the
authorities that the mosquito was the sole cause of the disease
spreading, that besides fighting it no other work was undertaken save to
make the sick as comfortable as possible.

Finally the results began to be apparent. The number of cases gradually
diminished, until long before frost came the city was free from the
great pest. Yellow fever will doubtless appear from time to time in New
Orleans and other cities, but there is, at least there should be, small
danger of another great epidemic, for the people now know how the
disease is caused and the remedy.

Not long since I had occasion to write to a prominent entomologist in
Louisiana for some specimens of the yellow fever mosquito for laboratory
work. The following extract from his reply will show something of the
work that is still being done there.

"I am afraid we cannot furnish specimens of _Stegomyia_, in spite
of the fact that Louisiana is _supposed_ to be the most favorable
home of this species in the South. Since the light occurrence of
yellow fever in this State in 1905, a very vigorous war has been
kept up against _Stegomyia_, and the ordinances of all Louisiana
cities and principal towns require the draining of all breeding
places of this mosquito and the constant oiling or screening of all
cisterns or other water containers. The result is this species is
very rare. Here in Baton Rouge I only see one once in a great
while, and it would require perhaps a good many days' work at the
present season to get as good specimens and as many of them as you
require."

IN THE PANAMA CANAL ZONE

Yellow fever was one of the worst obstacles that confronted the French
when they were attempting to build the Panama Canal. The story of the
suffering and death from this dread disease there is most pathetic.
Ship-load after ship-load of laborers were sent over, as those who had
gone earlier succ