, that the red of a colored print was
copied of a red color, on paper spread with the chloride of silver.**

** In 1842, I had shown me a picture of a house in the Bowery, which
had been repaired a few days previous, and in the wall a red brick
left. This brick was brought out on the Daguerreotype plate of
precisely the same color as the brick itself. The same artist also
exhibited to me, the full length portrait of a gentleman who were a
pair of pantaloons having a blue striped figure. This blue stripe was
fully brought out, of the same color, in the picture.--AMER. ED.

"In 1840 I communicated to Sir John Herschel some very curious results
obtained by the use of colored media, which he did me the honor of
publishing in one of his memoirs on the subject from which I again copy
it."

"A paper prepared with muriate of barytes and nitrate of silver,
allowed to darken whilst wet in the sunshine to a chocolate color, was
placed under a frame containing a red, a yellow, a green, and a blue
glass. After a week's exposure to diffused light, it became red under
the red glass, a dirty yellow under the yellow glass, a dark green
under the green, and a light olive under the blue.

"The above paper washed with a solution of salt of iodine, is very
sensitive to light, and gives a beautiful picture. A picture thus
taken was placed beneath the above glasses, and another beneath four
flat bottles containing colored fluids. In a few days, under the red
glass and fluid, the picture became a dark blue, under the yellow a
light blue, under the green it remained unchanged, whilst under the
blue it became a rose red, which in about three weeks changed into
green. Many other experiments of a similar nature have been tried
since that time with like results.

"In the summer of 1843, when engaged in some experiments on papers
prepared according to the principles of Mr. Talbot's calotype, I had
placed in a camera obscura a paper prepared with the bromide of silver
and gallic acid. The camera embraced a picture of a clear blue sky,
stucco-fronted houses, and a green field. The paper was unavoidably
exposed for a longer period than was intended--about fifteen
minutes,--a very beautiful picture was impressed, which, when held
between the eye and the light, exhibited a curious order of colors.
The sky was of a crimson hue, the houses of a slaty blue, and the green
fields of a brick red tint. Surely these results appear to encourage
th