The Indianapolis journal. [volume] (Indianapolis [Ind.]) 1867-1904, 1897-12-19
patron might be induced to come forward

patron might be induced to come FORWARD
and donate the necessary sum.
This appeal was inserted in LIE Temps ana
the next day a M. Dessaux sent the neces-
sary $500 francs to M. Marcy. M. Contre-
mouths was then in a position to push the
work ahead on his apparatus, which was
delivered to him in it's perfected state the
first of last month.
tiles has made good his promises. 1t has
already searched for and found the Dalis
which two unfortunates had lodged in their
brains The operation of extracting them
was performed last week by M. Kenny in a
remarkably skillful manner. The patients,
who have recovered very rapidly, Will leave
the hospital next week. The success OF the
operation was proclaimed amid great APP
plause on Monday at the Academy OF SCI
ences, and on Tuesday at the Academy or
The principle of the method is as follows:
With the aid of two photographic proofs. OBJ
tanned at different times, of head inside
of which is seen a ball. the center OF his
ball is determined by ,geometrical con-
struction, and by it's relation to three liked
points or guiding marks traced on the face
of the wounded man.
Then. by means of small, movable arms
juttng outward, the ends of which come to-
gether. the relative position of the three
fixed points and the ball are determined.
The four extremities of these movable arms
are then attached to d compass. This COM
pass thus set is placed upon the head OF
the patient and adjusted to the three guide
marks on the patients face the eXtremlties
of the fourth arm, if the head has been
perforated, will coincide exactly with the
center of the ball 1t is then only necessary
for the purpose of extraction to follow the
direction indicated by the fourth arm and
to penetrate to the depth indicated by the
length of this arm.
PHOTOGRAPHIC PROOFS.
To obtain two photographic proofs which
will permit of the exact locating of the CEN
ter of the ball for the absolute imInobil-
ity of the Crookes tubes in connection
with the sensitive plates. With this end in
4I.f., .,fx
sealed in plaster and placed on the upper
part of the patients head, and to these is
screwed a metal plate The plate supports
on one side of the head a shutter, in which
is successfully disposed two Photographic
plates, and on the other side two improved
Crookes tubes, Joined in such manner as
to allow them to be moved in any desired
position.
Besides. this metal plate has on its outer
surface three jointed arms. whose extremi-
ties are placed on the three guide marks
on the patients face. These marks are gen.
orally one on the forehead and two on the
cheeks. This primary apparatus being thus
disposed land called the searching appa-
ratus') a Photographic plate Is slid into
current from very powerful Rhumkorn
coil giving a thirty-eight centimeter spark,
through one of the Crookes tubes.
At the end of quarter of an hour radio
graph is obtained. After this plate is devel-
oped the shadow of the ball will be distinct
ly seen In the interior of the brain. The
operation is renewed by means of a second
plate and second Crookes tube. In this
way two pictures of the same ball are OBJ
tanned, occupying different positions, for the
reason that the luminous focus of the two
Crookes tubes occupy different positions in
relation to the ball and the shutter inclos-
ing the plates.
The metal plate is then removed from the
patients head without disturbing the differ
ent parts of the apparatus. If we now pro-
long the focus of each of the Crookes tubes.
and the center of the shadow of the ball on
the corresponding photographic plates by
means of threads, we reconstruct the path
Of the luminous rays The point at which
these threads cross is the point at which
the luminous rays had but moment be-
ball and the point a. which the threads in
tersect each other gives the exact position
Of the ball in the brain, at the moment the
Photograph was taken. This apparatus Nj
Contremoulins calls THE compass schema
and by it regulates the compass of opera