Mineral Point weekly tribune. (Mineral Point, Wis.) 1859-1868, 1859-05-31
New Inventions.

THE STEREoMoSosoPE.-M. Claudet the vet :
eran photographed, has accomplished particn-
iar result In his ART. enabling him produce the.
stereoscopic illusion by the agency OF single mic
| Iure- ln the centre of large black screen.
there Is a space filled with a square of uround
glass, upon which, by some light managed be-
hind the screen, Is thrown = magnificent photo
graphic image representing landscape, a Dor.
,raif, or any other object. When The observer
looks naturally at that object or picture with
'ne Two eyes, without the help of any optical in
s,ruf"enf, an extraordinary phenomenon takes
Pi.'ee-she picture Is seen perfect relief as
when two different pictures are looked at ;hr,'
stereoscoPe Ii is not necessary to be al a
hAed uistahce from the picture it NAV be ex-
amined as well at ten feet As one foot. IA an or
binary picture. without the least fatigue to the
eyes Although considerably enlarged by the
instrument ITSELF the picture may be magnified
sun more by using large convex leBzes and
Two or three persons at once can examine it with
the greatest ease. being able also, while looking
10 exchange any remarks, or to express the SEN
sations suggested by the pic,ure-au ADVANTAGE
which Is denied by the use of the common ster
eoscope BY this remarkable discovery, NJ Clau-
Get has solved problem which has alway. been
considered as an impossibility by scientific men
ior the ssereono..oscope, by its very name must
sound like a paradox 10 the ears Of all those
whe are versed in the know ledge of the princi-
pies OF olnocular vision, until they have had the
opportunity OF repeating the experiments by
which M. Ciaudet has found a new fact which
they had not noticed or explained before This
new iacI ls' that the Image on the ground glass
oi The camera obsura produces the illusion of
rehei But the phenomenon does not take place
IL the image IS received paper. When the
medium Is ground glass, the rays refrlcted by
the various points of the lens upon that surface
are only visible when they are incident in line
concidng with the optic axis. So that the ravs
emerging from the ground glass. and entering
the right eye. are only those which have been
retracted oblIquely in the same direction BY the
lei side OF the object glass and those entering
the left eye, are only those refracted by the
right side of the object-glass.
PHoToGRAHrNG SoUND.-In another part of our
columns will be found the details of verv sin
gular discovery of NJ. ID. Scott by which means
s"unds may be made 10 record themselves
whether those sounds are those of musical iu-
struments. or emitted by the voice in singing or
speaking Prof. Wheatstone during his recent
visit to Paris, was invited by the A bbe Moigno
10 inspect the papers on which these sounds had
printed themselves, and said to have been great
Y surprised and pleased with what he saw
The mark produced on the paper by particu-
lar noe is invariably the same SO also If a per-
son speaks, the tone of voice in which he speaks
is faithfully recorded. As yet no practical ad-
vantage has been obtained BY this discovery {:
but Nj. ID. Scott Is sangulne that. in course OF
time, he viii SO far improve his apparatus that it
VIII be capable of printing speech. which NAV
be written off verbatim, To the great saving of
the labor of Parliamentary reporters-PLoko-
graphic Eng Nec.