This view of its notice was corrected by Sir H. Davy (in 1809), who gave
it the present name. In 1840-41, this gas vas employed for accelerating
the operation of light upon the iodized Daguerreotype plate.
John Goddard, Wolcott & Johnson, Claudet, Draper, Morse and others,
were among the first made acquainted with its use. Count Rumford,
Ritter, Scheele, Seebert and others, experimented with chlorine in regard
to its effect when exposed to the action of light in combination with silver.
In 1845, M. Edward Becquerel announced that he had "been successful
in obtaining, by the agency of solar radiations, distinct impressions,
of the colors of nature."

On the 4th of March, 1851, Neipce, St. Victor, a former partner of DAGUERRE,
announced that he had produced "all the colors by using a bath of bichloride
of copper, and that a similar phenomenon occurs with all salts of copper,
mixed with chlorine."

Preparation.--This is easily accomplished by putting about
two parts of hydrochloric (muriatic) acid on one of powdered
black oxide of manganese, and heating it gradually in a flask
or retort, to which may be adapted a bent glass tube.
A yellowish-green gas is disengaged, which being conducted
through the glass tube to the bottom of a bottle, can readily
be collected, being much heavier than the air, displaces it
completely and the bottle is filled (which can be seen by
the green color); a greased stopper is tightly fitted to it,
and another bottle may be substituted.

In all experiments with chlorine, care should be taken not to inhale the gas!

Properties.--Chlorine is a greenish-yellow gas (whence its name, from chloros,