
SLEEPING : SLOKINES;. 

The germ remains as yet undis- 
covered, but it is known to be carried by 
the Aedes mosquito just as the malaria 
parasite is borne by the 47opheles. 
Ades, being an inhabitant of houses, 
breeds more often in vessels of stagnant 
water than in swamps and streams. It is 
fought by practically the same measures 
as Anopheles, though fumigation is more 
important than in the case of the malaria 
carrier. It is the common practice in 
Panama to fumigate an entire house in 
which a case of yellow fever has oc- 
curred. 
The wonderful success of the battle 
against mosquito-borne disease is nowhere 
better illustrated than in the history of the 
Panama Canal. 
Our country was not the first to at- 
tempt this enterprise but it was the first 
to cope with the mosquito, and hence 
to succeed in building the canal. 
Without the sanitarian, the engineer 
was helpless; with him the greatest en- 
gineering feat in history was accomplished. 
Many other plague spots have been 
cleaned up by the same means, and other 
projects than the great Canal have been 
made possible by war on the deadly mos- 
quito. 
SLEEPING SICKNESS 
Sleeping sickness is a disease of man 
which has caused enormous fatality in 
Africa. 
It is produced by minute parasites 
called “Trypanosomes, which live and 
multiply in the blood. 
10 
Watercolor sketches of 4éd2s will be 
found in CHART 15. 
Such a scene is shown in WALL 
CASE-7:; 
CHART 21 is a view of part of the 
completed Canal. 
In WALL CASE 7 are shown a 
French and an American hospital at 
Panama. The difference explains 
why France failed and America built 
the Canal. 
These facts are presented to the eye 
by a series of models on the middle 
shelf. A chart at the top gives the 
drop in death rate resulting from the 
anti-mosquito campaign, and CHART 
14 is a picture of the man who directed 
the work. 
CHART 22 andachart in the bottom 
of WALL CASE 7 give the results 
of sanitary work in Havana. 
A map in. WALL CASE 7 and a 
model just beneath it illustrate one 
such instance. 
In WALL CASE 1o will be found 
a picture of a sufferer and near it a 
map showing the distribution of the 
disease. 
In WALL CASE og is an enlarged 
glass model of the parasite, and in 
WALL CASE 10a photomicrograph 
of the organisms in the blood. 
7 

