The DeSmet leader. (DeSmet, Kingsbury Co., Dakota [S.D.]) 1883-1891, 1886-09-04
LANDSCAPE PHOTOGRAPHY.
A Discovery That Promises tn Revolution'
ixe the Present Processes.

A Discovery That Promises In RovOlutlOEs ~
ixe the Present Processes.
The art of photography has taken Soma
remarkable steps Of late Francis Gallons
Compost to portraits, merging dozen facee
into one char acterlstic type tho tnscantanr
eoos picturing OF the lightntng-like strides
OF race horse and the phorographtng -
stals invisible to the naked eye, date back
less than q year; but Il has remained Tor
st. Louis gentleman to make discovery
that promises TO completely revolutionixe
the entire present process Of the art d.
John an Zendt, chief OF the medical corps
OF the United States marine hospital In this
city, he'd III his hand an ordinary tin black
ins Lox A lite piece had beon cut out Of
tn, center OF the Ill aud over the aperturo
a scrap OF copper foil, pierced with very
m mute hole, was soldered A tiny cnp8
could be placed over the copper, and tho In
side Of the box was painted black. Placing
a piece OF sensitized paper on the Lotion, Dr.
Van 2andt has with this absnrdly simple
apparatus taken just as good photographs
as it would be possible to obtain wlth The
most costly camera.
lie calls them "defraction pictureGv Fer
a long tins stulents Of what might -
termed this curious Of science have known
that light passing from an object Through =
very small hoe would produce faint piet-
ure of the Oh ect on n screen The small -
hole that this was ever tried with was about
as largo az a pin and tho apparatus ~:
garded simply as a scientific toy. Nobody
knew why the image ap. .,eared, but IL waA'
surmsed that the elges Of the hole In some
way acted upon the rays Of light Tiers
was no re- ection, as would be the cas-, with
lens, SO the term defraction was applied "
it. couple Of years R,o DIR. Van Landt,
who was taen in San Fran, il o, noticed thio
curious scientific fact, and the idea OF dxinR
tho detracled image by sensitive paper ~
once occurred TO him He began expegz-
mcntng, but found the great trouble vae
that the iinage was so faiat and shadowy -
was Of no value as q asis for q photographs
Then he tried makiag tho hole sma Ter. 1bs
effect was instantly to charped the outlines
and render them distinct All that then ~
mained was to project the picture so Formed
against sheet Of sensitive paper, or 9 Mega
i've glnss, aud the picture was fixed. Thus
tie apparent impossibiIlty Of photcgrapby
without y lens was accomplished. Dft Van
landts npparatJs Is, II plain IuEiiSas
imply lox With "a hole ia IT -'s (. NJ a
The hoio j. pointed toward whatever 81
desired to photograph, oni little pears
OF it, upside down, appears reflected on ~
bottom The hole varios In dianlster froEn
five hundredth to seyentieth Of an in<1k
Ire smallest produces the clearestcut ptct
ures. 1t would be impossible to make su3k
tiny oyifces without tue cid OF q microsc0pa
Under the powerful lens the doctor places =
fragment of copper roll, such a. mother cf-
pearl buttons comes on, and pricks IL WITH
the finest sewing neetls Known The hois.1
which must be absolutely anu niaths'natior
ally round, Is measured by micromstsE
under the glass, and IN that way brought o.
tho proper size st. Louis Globe Dsmourak