The Saint Paul globe. (St. Paul, Minn.) 1896-1905, 1903-08-02

tuned through a delicate adjusting
apparatus to sound notes ranging from
middle G to high c, with which the
mosquitoes filbrilS are elastically at
tuned. 1t is this sensitive auditory
system which enables the male to To-
cate his mate in the darkness of
night
Should the tests prove successful
Mr.. Nyhen, who has charge of the
mosquito crusade under the direction
of DR.. III. Lincoln Chase, will search
for and locate the worst malarial-in-
sect-breeding spots in the town and
arrange for the location of an instru-
ment at each pool to be used in con-
| nection with the petrolizing.
AS thousands of mosquitoes on APP
preaching the high notes become par
TALLY paralyzed and stunned, flypaper
will be spread directly under the vi
orator and electric bulb, so that they
may be caught and afterWard die when
they fall.
1t was first proposed by the Brook
line authorities to experiment with a
WindOW-screen, with the frame re-
moved and mounted on a board. Num-
bers of wire nails were to be driven
in between the meSheS and connected
by electric wires, by which arrange
ment one electrode of an induction
coil is provided the opposite electrode
being formed by the screen itself.
The screen being spread across mu-
steal instrument. the operator was to
press button which was to sound a note
whose vibration would have such po-
tent effect on the insect that 1t would
instantly dash against the live screen
and suffer electrocution.
The buzZing sound or musical note.
which so diStresseS persons hearing
these sumner nights. is emitted or made
by the female mosquito and is the sound
by which she attracts the male. When
within vibratory distance the male
plunges unerringly towards the sound,
and it is on this simple basis that the
experiments will be conducted.
1t has been maintained by some scien-
lists that the female is never attracted
by the buzzins OF another but recent ex-
haustive experiments held in the South
and especially at the Panama canal.
demonstrated that the musical note.
combined by electricity fly paper.
proves both attraction and death to both
male and female.
Mr.. Fleming has written to the World
the following conservative estimate of his
invention:
Nantasket, Mass. July 90.
To the Editor of The World
| Concerning the device which is the
subject of your inquiry beg to say that
| its usefulness depends entirely upon the
| value of the theory that the male mos
| quito IS susceptible to certain musical
| tone, and will project itself toward the
| point from which this tone emanate.
I I expect my electrical device to pro
/ duce this tone either by means. of a vi
orator or by utilization of an alternat-
| ing current of the usual voltage and
| frequency employed in residential lighting
| in closed circuit cell.
| This COIL mounted on a suitable
| sounding medium. would cause the tone
| by reason of the rapid changes in thu
magnetic condition Of the iron which
| forms its core
| 1 expect most excellent results from
| the use of this device in and around
habitations, but it must be borne in mind
| that its purpose is to attract insects tc
| certain point, where, by means of
sticky substance they may be caught OF
in some manner destroyed. 1t does moi
check the breeding only as it lessons the
number of males.
When l return to my business in Au-
| gust 1 may develop something new, anG
! in such event 1 will write you.