The Somerset herald. [volume] (Somerset, Pa.) 1870-1936, 1894-03-07
GREAT PHOTOGRAPHY.
A Picture Of Mont Blanc Taken
nom a Distance Of Eight Niles
me Marvellous Ozfoone Of Foor Months
ExperiIaentIug of Soted s~i-s
scientIsr-A Delicate and Dif-
EcuIf Process

A +r,lv marvellous development II
ra-era work is what has been termed
autobiography, whereby pictures OF
distant objects can be made Win me
saue elearness and sharpness OF oetali
as If they were close at hand but 20
seeure a successful picture By TINS
--oeess many difficulties have usn-
sIlv 70 be eontended with, and accord
inc 70 the St Louis Globe-Denoerat II
Is comparatively seldom that the mo !
favorable conditions occur. The main
diseuItv Is the presence IN the air OF
minute uarticles Of dust In large
towns. and even IN their neighooT-
hood. the air IS filed with an neon
eeivable quantity Of such particles
and the result Is a grayness Of the at
mosphere. which. on the Photographic
negative. biurs the outline OF remote
obSeets. Where these conditions OBJ
tain Il IS possible 10 procure good
r--cof only II the morning after noe
4urual shower has cleared the ar
Sseh is the absorbent power OF dusty
air that al attempts Al taking long
distance photographs II the vicinity
Of Paris. where much experiment
ing was done, resulted unsatisiac-
torilv beyond q range Of thirty-two
hundred wards. even when the occasion
vas apparently prOpitiOus- IN the
neirhborhoOd OF the sea and o. the
mountains, where the air Is much
purer. photographs can be made al
much greater distances but here
single obstacle presents itself IN the
UNEQUAL density Of the various strata
% air Especially in hot weather, Ger
tain beds OF air. heated by the rays OF
The SIN. VIII be actuatec by an up
ward movement and this imparts
trembling appearance 70 the land
seane. The presence OF rivers OF
marshes. or land much exposed 10 the
solar ravs. Is likely 70 give rise 20 yer
tieal currents Of vapor Of great absorp-
tive power Again the humid Tapors
of the atmosphere clothe far distance
with q blush haze. which confuses the
lines Of the picture and obseures the
effects Of Light and shade This Is rem
edied bv employing ortkochromatic
lenses and a yellow glass 20 neutralize
sl,e blue tint The camera must be
absolutely still. the most minute vibra-
tion being multiplied Indefinitely and
causing hopeless confusion in the neg
ative-
II VIII thus be seen that telephotog-
rapbv is both q difficult and a deli
cate process 4 most remarkable Illus
trati0a cf its possibilities has been
ae1,iered lv n. B0issounas. Of Geneva,
in a photograph OF Mont Blanc, taken
~ a distance OF eight and one-half
miles The proof has been published
bv II. Fourier, who also shows, IN
order TO suggest more strongly the
wonderful nature Of the achievement
the size the picture would be II
taken bv an ordinary object glass
The latter measures nine and one
sixteenth inches by three-eighths
inches. a-d the telephotograph Is i've
and three-fourths inches By three and
fbree-fourth inches. The lines Of the
massive. far-ofF mountain stand out II
bold relief. and the details Of the in
terriewing country are distinctly
shown. such a picture, however. !.
not made without almost unlimited
pains and perseverance 1t cost A.
Goissgnnas four months Of expert
raenting before he could determine OF
the best place and the best time al
which to take II. For the benefit Of
those who may have 70 tread wearily
over the same ground, he tells The
condition that obtained at the event
full moment It was six o'clock in thS
evening. about twenty minutes before
the sun sank behind the mountains
Prom experience he found that tins
rvss the most favorable moment TO OBJ
tain harmonious proof, and the dis
tinctness OF outline and details IN the
elouds was greatly increased from the
fact that they were tinged first with q
pale yellow and then with orange