Evening star. [volume] (Washington, D.C.) 1854-1972, 1908-03-01
COLOR PHOTOGRAPHY.
Lecture With Illustrations by Carl
L. Gregory.


A lecture was delivered last night at
the Medical Hall of the George Washing.
ton University. on H street between 18th
and 14th streets northwest by Mr.. Carl
L. Gregory. of the geological survey
under the auspices of the Washington
Chemical Society. his theme being THE
New Color Photography 1T is now
said Mr.. Gregory commercially posi-
bic to reproduce. in its natural colors,
without touching up in any way. the
human face. form. clothes and other OBJ
jects in nature" and this declaration was
supported by the reproduction by means
of stereopticon upon white sheet set
up near the young lecturer, not only
of garden seeds. ears of corn. white and
yellow: church windows. butterflies
beetles and shells Of pearl with their deli
cate coloring but splendid photographs,
80 natural In appearance as to be almost
startling. Indeed. of one of them Mr..
Gregory himself was tempted to remark
that that arm looks natural enough to
pinch
The lecturer was introduced by Mr.
Joseph s. Chamberlain. president Of the
Washington Chemical Society, who ex-
planned that, although the regular meet
ings of the society were usually held
matters. the occasion last night was g
special one. made possible through the
kindness of DIR. Phillips. dean of the
George WASHINGTON University medical
staff. in rendering the use Of the hall, and
of Mr.. Gregory in consenting to lecture
for the public benefit, and to exhibit his
marvellous collection of lantern slides
showing the results of his own expert
ments.
The principle of reproducing, by means
of photograph. objects in their natural
cOlors was first enunciated in 1862 said
Mr.. Gregory. by Ducros de Hauron, a
Frenchman. who is still living: but II
was not realized in practice because OF
the insensitiveness Of the silver salts, as
then prepared. to the red and green rays.
Since the discovery by DR.. Vogel of q
means Of sensitizing for the lower regions
of the spectrum. by means of organic
dyes. this dream of Hauron has become q
reality.
Antoine Lumiere of Lyons, France
first described the process five years ago,
but only very recently has 1t become
commercially possible to reproduce OBJ
jects in their natural colors by the pro-
cess invented by him."
At the present time. Mr.. Gregory. Mr.
Frederick E. Barr and Mr.. c. A. Shustel
of the geological survey are still expert.
mepting In the process which has been
| SO nearly perfected by Lumiere. and Its
possibilities In the near future. 1t Is said
are wonderful to contemplate. To Mr.
Fred l.. Ives of Philadelphia, belongs the
credit of originating. In 1883. the three.
color process Of illustration which is sc
extensively used In the magazines today
Mr.. Gregory explained the Lumiere
process in minute detail. 1t involves nins
different stages. he said. with baths" OF
greater or less length between each
namely. the developing. the reversing
| the second development. destroying de.
velopment. intensification. clearing, fixing
drying and the final vanishing q the
| photograph. Samples Of achievement by
| Mr.. w. Simon of Baltimore. q member
| Of the society. were also shown. and
| were highly commended.
A large audience was present, and man,
| ifested it's pleasure frequently in applause
which was sometimes so long and vigor
GUS as to interrupt the lecturer.