Deseret evening news. [volume] (Great Salt Lake City [Utah]) 1867-1920, 1894-11-10

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Most OF us accept the house ny as a
fact which has little relation to other
facts. Where Il comes from in the
spring or where It goes to 10 the fall are
questions which are seldom asked and
still more seldom answered.
II we meet with reasonable degree
OF success In keeping them out OF our
houses, we are content, aud our atten.
ton Is given to matters which we deem
of more practical value II we are led
to devote little time to really thinking
about flies. the result usually is that we
conclude they are unavoidable evils,
which we will have to endure because
we have no means Of cxtcrmuaung
them. More thought, coupled with in
telligcnt observation, would lead to
modification Of this vicW.
Modern research has demonstrated
that most OF the diseases which aHlct
us are caused by germs OF minute an
mails or plants which have been taken
into our bodies. These germs may be-
inhaled with the air we breathe or they
may be IN the food and water which We
use.
In almost every case the germs develop
and multiply in filth. especially m fltl
resulting from the rapid decay OF ANNA
and vegetable matter Il is a universally
admitted tact that persons and cUmmuui.
ties where little attention Is given to
cleanliness are especially subject 10 dis
ease, and especially those diseases which
are usually called contagious and cpl.
dcmic This filth, which is so dangerous
because OF its furnishing q breeding
place iOr the germs before mentioned
forms the natural food Of flies, and oi
course IN eating II, they destroy all Of its
dangerous properties IN thus eating
and destroying filth wherever they find
n, flies act as bcneiactofs Of man. 10
lies are especially numerous 10 means
that they find plentiful supply OF food
and however disagtecablc they may De,
we may comfort ourselves with the
thought that the disease germs which
they are starving TO death would do us
much more harm than the Ilcs possibly
can, "A better plan however, than
simply INDUCING In that reflection, would
be to Join the HES IN their srlf.Impuscd
duties as scaveugefs, and clean up the
premises, and thus at one stroke get rad
OF the dangers Of disease and Of the
flies. II Is not only Ia their mature state
that flies act as our friends, but they be.
gin their good work MS soon as they are
hatchcd from the egg. Flies lay their
eggs around stables. Single nics some.
times lay between one and two hundred
eggs In day. The eggs hatch In about
one day, and the young lly begins It's lite
as smooth, ioot.css, round white
worm. II has a yoracious appetite and
by the time Il IS one day old IL has be-
come too large ior is skin, which bursts
and peals OIL. AT the end ul the second
day II sheds It's skin again Three or
four days later the little worm begins to
contract In length and to assume a
hafrel-llikc shape. Its skin now be-
comes dry aud hard, aud most Of the
functions Of life are suspended. Natur.
alis,s call this condition u pHbd state.
IL remains IN this quicsccnt state Tor
about a week. by that time a wonder !
iul change has taken place. The mouth |
has undergone a complete tunsioma. ]
ton, the digestive system has been /
changed, the body has been separated |
into three well defined parts, and legs |
and wings have been developed and IN
short a worm has been metamorphoscd I
or transformed into an insect. As q
perfect insect the .ly may live for several |
weeks, and a lew always manage to live |
all winter. and lay eggs IN the spring Tor
the ncNt generation
The student will be interested in a |
close examination OF the ily; although Il |
has but one pair OF wings when are /
fully developed, It has a back pair which
are rudimentary. Various explanations
have been given Of the ly's ability TO
walk on vertical polished surfaces. The /
truth seems to be that the hairs which |
arc found on the cushions Of H. feet are
hollow and that through these hollow
hairs a fluid Is allowed to escape on to
the smooth surface and that this iluid |
by means OF capillary attraction enables
he lly to adhere, whatever It's position
may be. {. A. WmTlNG.
University OF Utah.
Teaching OF Elementary Latiu.