Daily press. [volume] (Newport News, Va.) 1896-current, 1908-09-25
RAPID ADVANCE
IN PHOTOGRAPHY

No branch of science has shown
greater progress during the last few
months than pilot ography. and ii
seems as if almost a revolution were
taking place in Photographic methods
BY an invention which is now being
tried it may be possible to take photo
graphs without any apparatus what
ever excepting the plate, and by anoth'
Ier process photographs may be print
ed without any light at all.
1t is to Prof Lippmann. of the Paris
University. that we are indebted for
the wonderful Argus-eyed plate. which
requires neither separate lens nor
camera The surface Of the plate is
covered with tiny lenses, Of which
there are $1,000 in the square inch
the whole forming a kind of gelatine
honeycomb.
This plate has merely &c be exposed
to tn object for certain time. and
then il can be covered and treated.
The result is wonderful photograph,
which is far different from any now
known. as the objects stand mp in re-
lief as though sen through a stereo-
scope. and the perspective is not dis
torted. which is the case with most
present methods.
BY the Donnisthrope process photo
graphs need no longer be taken upon
glass or similar transparent SUB
stances. The photographs are taken
upon Hack paper. Prints can BE- TAX
en- from these negatives, and also the
usual kind. by immersing them in a
dye: the paper is placed in close con-
tact, and when pulled off the negative
contains a faithful reproduction the
same color as the dye used. Thus a
multitude of various coiored photo
graphs can be obtained, irrespective
,of Illumination.
New uses are being found for photo
graphy in all the-branches Of human
labor As an example, 1t may be men
toned that flaws in metal which can
not be detected by the human eye are
rendered visible by the Photographic
plate.
In astronomy photography has wed
ened the field enormously. Not only
can the stars be recorded with the
greatest accuracy, but the photo
graphic plate sees more than twice as
many stars as are visible to tine hum
an eye aided by the most powerful
telescope. More than this, the sensi-
tive plate IS capable Of resolving what
appears as single star to the hui
man eye into a number of astronomi-
cal bodies. Many astral bodies which
appear to the human eye to be stars
photography has shown to be Of a
nebuious constitution.
The same assistance has been
given to the Numerically opposed
science of microscopy. Special glasses
have been invented from which com
pletely transmit ultraviolet rays. so
as to photograph objects otherwise in
visible, because below the resolving
power Of the most powerful micros.
cope. BY this marvellous advance OF
photography it is possible that an Oh
ject measuring only 1.725, 100000 part
Of an inch in length may be brought to
view.
Photographing through opaque sub
stance has now ceased to be novel
but very inter esting instantaneous pic
lures have been taken recently by
means Of the X-rays. These rays,
as we'll as these which are utilized In
wireless telegraphy. are really only
manifestations Of light to which our
eyes are bind. but which can be de-
tacted by the sensitive plate
The modern photographic plate Is
responsive to many rays yhich have
no effect at all upon thu human retina,
and SO many thinrs which were IN
known and unsupported have been re,
yta!ed to Us. II is nov known thai
many things exist which are not per
ceptible at all to the unassisted OBJ
server.
+ II has been found that many pro
per,ies which were considered to he
quite exceptional are common. For
instance. phosphoresccnse has been
proved tn exist In every substance. and
so from dav to day the photograph
plate is revealing new marveis. and Is
showing that we are really only poor,
blind creatures feeling about In the
dark.
Although our range o! vision V
limited. Il varies In different inf'vif'
uals. and Photographic experiments
have shown tina; the whole world ap
pears different to each Of US. and no
two Of ms see alike. In technical Ian
xuage. the length Of the visible spec
trun varies with the individual
that Ia 20 sag. each individual has
different capacity for detecting color
So q Ia tina: We now possfs' nun
bcr " seeing machines which cnas''
Us 20 perceive forms Of tgaf TO witch
W. have been perfectly bird. There
gro endless forms Of light. nr si5rat
ions NJ the ether. 20 use the scicntfic
phrase. Of which W shnn'd have mao
no knovIcdge except Tor such SEEING
inetrymeats. In fact. until recently
-. have had no more know'cdgs q.
these radiafiors than man VINO had
lived his life fn:arkncss vusId have
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