The DeLamar nugget. [volume] (DeLamar, Idaho) 1891-1900, 1894-03-10
GREAT PHOTOGRAPHY.
= Picture Of Mont Blanc Taken
s<om Distance Of Eight Miles.
The Marvellous Outcome Of -Four Months
Expcrimentiag OF Noted Swiss
scientist A Delicate and DIFF
ficult Process.

A truly marvellous Development IN
camera work is what has been termed
autobiography, whereby pictIres oi5
distant objects can be made with ssc
same clearness and sharpness of detail
as il they were close at hand. But to
secure successful picture by this
process many difficulties have usu-
ally to be contended with, and accord
ing to the st. Louis Globe Democrat it
is comparatively seldom that the most
favorable conditions occur. The main
difficulty is the presence in the air Of
minute particles of dust. In large
towns, and even il their ncighbor-
hood, the air is filled with an neon.
ceivablc quantity of such particles,
and the result is q grayncss of the at
mosphere, which, on the Photographic
negative, blurs the outline of remote
objects. Where these conditions OBJ
tain it is possible to procure a good
proof only in the morning after a noe
turnal shower has cleared the air.
Such is the absorbent power of dusty
air that all attempts at taking long
distance photographs in the vicinity
OF Paris, where much experiment.
ing was done, resulted unsatisfac-
torily beyond range of thirty-two
hundred yards. even when the occasion
was apparently propitious. IN the
neighborhood of the sea and of the
mountains, where the air is much
purer, photographs can be made at
much greater distances; but here
single obstacle presents itself in the
unequal density of the various strata
OF air. Especially in hot weather, GER
tain beds of air, heated by the rays of
the sun, will be actuated by an up
ward movement and this i1nparts a
trembling appearance to the land
scape. The presence of rivers or
marshes, or land much exposed to the
solar rays, is likely to give rise to YER
teal currents of vapor of great absorb
tive power Again the humid vapors
OF the atmosphere clotae far distance
with blush haze, which eonfuses the
lines of the picture and obscures the
effects of light and shade. This is rem
edied by employing orthochromatic
lenses and a yellow glass to neutrallze
the blue tint The camera must be
absolutely still. the most minute vibra-
ton being multiplied Indefinitely and
causing hopeless confusion IN the neg
alive
1t will thus be seen that telephotog-
raphy is both difficult and deli
cate process. A most remarkable illus
tration of it's possibilities has been
I H. 1esr Of
in photograph OF Mont Blanc, taken
at distance Of eight and one-half |
miles The proof has been published |
by M. Fourier, who also shows, in |
order to suggest more strongly the
wonderful nature of the achievement.
the size the picture would be if |
taken by an ordinary object glass.
The latter measures nine and one
sixteenth inches by three-eighths
inches, and the telephotograph is five
and three-fourths inches by three and
three-fourth inches. The lines of the
massive, far-off mountain stand out in
bold relief, and the details of the in
country are distinctly
shown. Such a picture, however. is
lot made without almost unlimited
pains and perseverance. 1t cost III.
four months of expert
nenting before he could determine on
he best place and the best time at
which to take it. For the benefit of
hose who may have to tread YEARLY
,ver the same ground, he tells the
condition that obtained at the event
nj moment. It was six O'Clock in the
vening. about twenty minutes before
he sun sank behind the mountains.
from experience he found that this
vas the most favorable moment to OBJ
ain harmonious proof, and the dis
inctness of outline and details in the
LIQUIDS was greatly increased from the
act that they were tinged first with a
'ale yellow and then with orange.
/ COUNTRY WITHOUT SILVER.
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