Evening star. [volume] (Washington, D.C.) 1854-1972, 1901-07-15

Mr.. N: eats with great relish when in the
| wild state, and which Mrs. NJ deigns to
goooie up when warm blood is not 10 be
mad. Dr. Rosenau finds that mosquitoes
| not born In captivity suffer homesickness
| or melancholia, often resulting in suicide
| from starvation. In each breeding Jar YVES
| generous vessel of water, upon whose sur
| race were strewu numerous little RATS
| made Of twigs and blades OF grass. These
| had to be introduced because Mrs. Mos
quito refuses to lay her eggs elsewhere.
| In the mosquito hatchery will be numer-
Gus glass jars filed with Shiny marsh
water, bearing the many little boat-shaped
masses into which the mosquito mother ce-
| ments her collection of 20 eggs after each
| Matching. From these were escaping hun
| dreds of minute wiggiers. vibrating through
| the water Hike microscopic measuring
worms and returning every minute to the
surface to breathe in air through strange
little tubes in their tails. A drop OF water
placed under the microscope revealed one
or these squirmers, appearing, when magni-
ned. as large and goggle-eyed a baby
lobster, and surrounded by its natural food,
school of animalculae. fastening here
and there like restless swarm of gnats
How Bugs VIII he Dissected.
The new laboratory will actually contain
dissecting tables for insects. DR.. Rosenau
demonstrated to me how he could expose
malarial mosquitoes salivary glands by
aid Of q delicate little meat chopper. The
opened gland, placed under a powerful
microscope. could then be dissected with a
minute needle point, exposing whatever
liVe germs were present. Doubtless you
don't know" said he. that while the young
mosquito is developing from its aquatic to
It's winged state The malaria germ which it
mas eaten is passing through similar
state and that a further stage OF the
germs development must walt until the
adult mosquito has injected ii into mans
blood. If il were not eaten by the mos
quito it would not attain its early growth,
N nj tod u,
6ne last period would not be attained In
other words, if either man or the MOSQUITO
or both were eXterminated the malaria
germ could not grow to its dangerous per-
lection"
| The flea will be subjected to scrupulous
study In the laboratory, now that IL has
peen discovered that it transmits the black
plague from the rat to man So will the
ny be put through the mill to show how he
spreads cholera as well as typhoid And
the mosquito will not escape after 1t has
been demonstrated how he may spread vel
low FEVER and typhoid. for it has just been
discovered that he communicates to man
that most hideous of all diseases, ele-
phantiaSis.
apartment on the second floor This must
be isolated and screened off. Plague is so
dangerous disease that it cannot be
worked with in a general laboratory fly
OF Hea lighting on exposed specimen
containing the germs might carry IL away
ana infect persons throughout the capftaI
ANIMALS used in the plague experiments
VIII be given repeated antiseptic baths to
prevent flea other insect couta mination
Plague cure by the ten thousands of bot
ties VIII be manufactured in this room
Plague germs grown in bouillon will be al
lowed to die therein. The resulting SUBJ
stance, gradually applied to the blood OF
man, will communicate a partial disease
and serve as form Of vaccine. Another
form OF plague anti-toxfn will be made in
the blood of living horses, just as Is that
which cures dphtheria
Inc first national institution for the cure
OF hydrophoba will probably be one branch
or the laboratory. Hydrophobia cure WILL
be manufactured there in any event There
will be one room for inoculating rabbits
with that terrible disease another wherein
their spinal cords will be removed. dried
and ground into powder for the manufac-
ture Of the medicine; a third where people
bitten by rabid dogs may be brought for
injection.
Monkeys to he Employed Here.
Monkeys will be favorfte animals for
incubation experiments, because as Dr.
Rosenau explained. they are the only
beasts subject to practically all human dis
eases. They can be vaccinated tust as We
can They readily contract scarlet fever
measles and such maladies. Goats will be
used in the manufacture of a new anti
toxin for epidemic spinal meningitis and
Of new pneumonia serum Calves will be
used in vaccine manufacture.
Turtles and allfgators will be subjects of
novel experiments whose aim will be to
partially communicate to man their Won
derful resistance to many dread diseases
Furthermore they are veritable storage bat
teries for disease germs and their poisons
While other animals Secrete these poiso1s
turtles especially store them up. and the
effects can thus be studied over a long
period.
1 asked DR.. Rosenau whether In hts new
laboratory. he would not have stored away
sufficient disease germs to exterminate the
entire population of Washington
Il have sufficient for that in this little
tube. said he, holding up a glass nest Of
plague germs. land this is only one of 1000
tubes. containing 800 diseases. which we
have already bottled and ready for USE
JOHN ELFRETH WATKINS. Jr.