The farmer and mechanic. [volume] (Raleigh, N.C.) 18??-19??, 1912-07-16

sHhatl YOU cannot Sc. Them with 4
microscope hut We know that they
exist and that theN mulQuly 50 r.rld-
" that they tlnatly come into n.
silva Ct the mosquito. When the
MOSQUITO, having been infected Win
these Parasites. bites man a second
ilme she lnleCts some II his SALIVA
containing the parasites and this gives
man the yellow fever o. malaria.
IT IS. however, the enophel. or3y
thai transmits malaria. and IN. steGo-
mNia onlv that gives yellow fever.
There i 10 such thing IS men having
either OF these diseases Il he j. not
ttll.n tE these mosquitoes
Yellow Fever Not contagious.
tut how Do YOU know hat. toluH"l
Gorgas | asked.
1t has ben proved ~ many ~
~periEents. The fact THAT tn. mala-
rial MESQUITE would transmit malaria
was discovered t31 an English army
surgeon. kenoId gtoss. and. a. you
may remtmher, experiments We're
made IN the lust outsid.
i>ome. which proved there was no
DANCE OF disease. ii that ever-s1ri, ken
district TO those who live in screened
houses and were not bitten lS mos
1u1toes. The fact that the yellow
FEVER MOSQUITO would transmit the
yellow fever was discovered ~ a
i iltiil'iN. =
reed. Carroll. Agramonte and laz-ar.
AT Havana. 1t was their discovery
mat enabled us to wipe the yellow
lever out Of the Island II Cuba and
later on to clean up the isthmus.
| heSe doctors made experiments
which showed that yellow fever could
not De taken unless q man was bitten
by a yellow fever mosquito. They
had men sleep in beds in which VEL
low fever patients had died. They
even had them covered with the black
Vomlt OF q yellow fever patient, and
&c be exposed to the frem
yellow fever, but none caught the dis
ease until he was in the right cnndi-
ton 70 transmit the disease.
That story is too long To tel,
now continued Colonel Goryas.
Those discoveries. however. viii go
down IN history 40 among the ITtat
events OF the world. and the Aneri-
can doctors at Havana who permit
ted themselves to be bitten BY Vel
low fever mosquitoes and thereby
took the fever that they might make
these investigations deserve to he
ranked among the greatest If our
heroes. OF them. Or. LAzear died.
Or. Carroll tool the disease. bot re-
covered. Dr-~Reed was absent al me
time the test was made"
~" Xix S"oAS - HtVl I1thItttN.
Tell me in a few words how YOU
keen out the mosquitoes. Colonel Con
gas"
Our first work here was In cl.nI
up Panama and Colon. and espetiaity
all places on the cone within 2ur
yards of the settlements. We lean
ed the cities to get rid of the yellow
lever. and We have drained All places
about the Settlements and kept dow II
- the vegetation to fight the ma aE t4
In some places our drains are mad. II
, concrete and IN otherS they are open
bitches which must be kept free from
grass. We have also subeoil dram
age. We have taken away the breed
ing places and are trying to KEEP
them away. We have a sGu hri-
, Sade. which is devoted to this bust
. ness. We have also hosed our men in
mOSHu lto-proOf quarters. Their homes
are covered with Woven wire in such q
) way that they practically sleep out ~
doors safe from all insects. In add
ton to our drainage system We sprin-
kle all such sta gnant water as w
cannot drain with rud petroleum &c
. destroy the larvae or young If the
MOSQUITOES. The larvae are the little
Wlgglers you have seen In rain bar
relS. They are the adpoles IF hi
MOSQUITO, if YOU Will imagine the ,nns-
GuitOes frog. they are air brealhers
and must come to the top Of fhe
water very few moments 10 get air
They are fond Of the larvae and eI1
oil scum. and are s~uffocated ~ Il
We use also ~larNacide. another pr
ventve and we have imported fish
from Barbados to put in the pools
They are fond Of the larNat and eat
them
i suppose YOU use a great deal Of
, oil?"
We are using about a Thousand
barrels a month. and also about 800
barrel Of larVacide. But YOU must re-
that The use Of oil is IL a
!. certain extent 4 confession Of faiiur.
as to the drainage. If We could keen
down the breeding places of the mos
> quito including the pools drains and
water holes hidden nv vegetation. v.
should not need oil at all. We are
using less and less As We extend our
system Of drainage.
''IA4 f~4. hn6c / haNn rn --x