Knoxville daily chronicle. [volume] (Knoxville, Tenn.) 1870-1882, 1881-08-02

dressing was concluded his head and
shoulders were raised IN the same
manner as yesterday. and he took
solid food for breakfast with more
relish than he has hitherto shown.
At present his pulse is 100, teInpera-
ture 90 4, respiration 10.
[Signed] d. W. Bliss, J. K.
Barnes, j J. Woodward, Robt. Rey-
burn, D. Hay es Agnew.
OFFICIAL BULLETIN.
EXECUTIVE MANSION, 7 D. m.-The
President has remained with his
head and shoulders elevated until
time for dressing his wound this
evening. 1t continues to progress in
satisfactory manner and discharges
health " pus freely the deeper as well
as the superficial portions. He has
taken nourishment well and in suffi>
cient quantities, and in all respects
continues to do well. The rise Of
temperature this afternoon is slight.
At present his pulse is 1O4, temper
ature SO, respiration 20.
TSigned] D. ", Bliss, J. X
Barnes, j. J. Woodward, Robert
Reyburn, D. Hayes Agnew.
EXECUTIVE MANSION, Aug. 1.-The
induction balance used by Profs.
Bell and Tainter in the experiments
made this morning for the purpose
of ascertaining the location of the
ball in the Presidents body, differs
very. materially from the apparatus
with which they began experiment
ing several weeks ago. Important
notifications and changes have been
made in the shape, size and arrange
ment CT the induction coils.
The small clock which was
a part of the original ap~
paratus has been dispensed with
and the condenser has been intro>
duced into the primary circuit.
The result of these notifications
and improvements is an apparatus
which, although not essentially new
in principle, is more sensitive to
small masses of metal at a distance,
and better adap ed to the require-
ments of military surgeay than any,
thing Of the kind hitherto devised.
The apparatus in its present i'm
proved form consists of two fiat
coils, about four inches in diameter
and one>half inch in thickness, of
insula ed copper wire battery, a
! condenser and an interrupter or
] circuit breaker and a telephone.
The ends of the primary or
inducing coil are connected with the
poles of the battery, and in the same
circuit are condenser ana small in
terrupter, whose vibrating tongue
opens and closes the circuit with
great rapidity. The ends of the
secondary coil, in which the current
! is to be induced, are carried to the
binding posts of the Bell telephone.
/ When the connectione have all thus
been made the secondary coil is laid
on primary or inducing coil, so
that their respective cirCumferences
exactly coincide. The circuit breaker
is then set in motion and the rapidly
/ interrupted current through the prIo
mary coil induces another current Of
higher intensity IN the secondary
coil, and as it does so a loud musical
tone is heard IN the telephone to
which the seconeary coil is connect
ed. AS long as the current is main
tanned and the circumferences of the
two coils are kept in exact chinci-
dence, the musical note IN the tele~
phone does not change its pitcn or
intensity. If, however, the experi>
menter slides the upper coil along
an inch or so upon the lower, SO that
their circumference no longer corr
respond, the intensity of the musical
tone is diminished. and Just
in proportion as the ccnters of
flat coils are separated by greater
or less distance, tue intensity of the
musical tone is lessened or increased.
When the upper coil has been
sidden over the lower, so that they
simply overtop the center of the one
corresponding nearly with the point
on the circumference of the other,
the musical tone in the telephone
ceases. II the upper coil be pushed
a little further to one side, SO that it
overlaps, still less tone is again
heard. By delicate manipulation it
is possible to adjust the centers of
the overlapping coils at such dis
tance from the other that perfect
balance is brought about. and when
this is the case the telephone makes
no sound whatever. The centres of
the overlapping coils cannot then be
moved either toward or away from
one another without causing the tel~
ephone to break it's silence when the
coils are thus balanced, and the tele-
phone is mute, it is found that what
may be called the area of coincidence
or in other words, the area of over
topping the points of two fiat coils
has become highly sensitive to the
approach of metal and manifests its
sensitiveness by a low note in the
telephone as long as the metal is
kept away from this area the tele>
phone remains silent but if the piece
of lead, for example is brought
within distance of four or
five inches from the
heard in the telephone a faint but
clearly perceptible note which be-