New-York tribune., 1897-02-09
PHOTOGRAPHY ~ C0LORS.

A DISTINCT ADVANCE on ALL OTHER METHODS
Sir Henry Trueman Wood in The London Times.
further advance has now TO be recorded, and
one which appears 20 give results Of mucn greater
PTactcai value Than any OF hos PTe"2}usy G
Joly) NJ, Nilledleu Chassagne OF Paris. has lately
S2tnvS JOINT Invention % Of himself and Dr. Adrlen Michel
DanSac by which photographs car be produced
showing the actual coloTs Of tho objects photo
The process short r2 ACCOUNT Of which Is given in
is simple and inexpensive one negative is
taken on geatine plate. which has been treated
solutions used Is for the present kept secreD. The
negative * dev loped and fixed in the ordinary
From II positive is printed on sensltIzed paper
or on gelainc film Of transparency is desired
plate or paper having previously been treated with
the unknown solution. The positive looks exactly
Ike an ordinary Photographic print or Tanspar-
washed over with three colored solutions blue.
green and red and takes up in succession the ap-
propriate color in the appropratc parts the com
6nauons o. the colors giving all varieties of tint.
OF green the sky becomes blue The flowers show
their proper colors The bricks and tiles OF the
tints out well. and the different colors of the
costume are accurately. given. The general ap-
pearance Of the picture is that OF colored photo
taken for onS Inspected under nigh mSsnfylns S
In a manner hardly possible for hand work Bu:
10 accept scS sang G and Hpe noy@ wHqa 1S 9f
uine Personally reserved my opinion until had
20
deception
Last week N. Chassagne was good enough to
ddemonstraie his process in the laboratory OF
Kings College IN the presence Of Professor
Herbert Jackson. OF Kings College. Captain Al.
ney admittedly our greatest living authority on
may claim tha, We werc none Of us likely 10 be
taken In over a photogT iphc process and We are
all satisfied tnat the Inventor really did what he
professed Authoritative evidence OF this sort Is
only required because with a quite legitimate ret
icence NJ ChasSagne keeps secret the materials
he uses From scientific poin; Of view This is "a
on inventor who expects 10 make profit ont Of
his invention, and who would probably forfeit
itself seemed 10 be OF sufficient interest TO Justify
examination. even though our Investigations could
n Chassagne treated ls wi.R perfect success some
positives ne had brought with him. and with quite
made by some OF ourselves from negatives which
took of various test objects. The light was
our pictures were inferior still when tfca,cd rs
above described. they showed color With perfect
did were a bunch of flowers in colored
vase and an Indian brass pot. The latter.
though wanting In vigor. showed distinctly
not only the color, but something Of the metallic
lustre OF the original Without Information as 10
the materials Jsed. II seems hardly worth while TO
hazard any guess a. 10 the nature OF the process.
Certainly there is good deal which j. new, even
mysterious about il. Nothing know about the
action OF light tustifes Us IN believing that n can
eber the silver salts or the colloid vcbicir pbic
such fashion TO give them capacity of ~e-
lective absorption. the power to take up specific
is dnicult 10 accept still difficult, IS II TO be-
lieve that this power can be transmitted through
mains Iaieoti to positi%n Stili tbos, Who ~ ~
seen the results attained are forced TO admit their
possibility, though they may be unable TO hazard
reactions which take place.