162 Mr. Faraday on fluid chlorine. 
ajar of water, there was an immediate production of chlorine 
gas. 
I at first thought that muriatic acid and euchlorine had 
been formed ; then, that two new hydrates of chlorine had been 
produced ; but at last I suspected that the chlorine had been 
entirely separated from the water by the heat, and condensed 
into a dry fluid by the mere pressure of its own abundant 
vapour. If that were true, it followed, that chlorine gas, 
when compressed, should be condensed into the same fluid, 
and, as the atmosphere in the tube in which the fluid lay was 
not very yellow at 50° or 6o°, it seemed probable that the 
pressure required was not beyond what could readily be ob- 
tained by a condensing syringe. A long tube was therefore 
furnished with a cap and stop-cock, then exhausted of air 
and filled with chlorine, and being held vertically with the 
syringe upwards, air was forced in, which thrust the chlorine 
to the bottom of the tube, and gave a pressure of about 4 
atmospheres. Being now cooled, there was an immediate 
deposit in films, which appeared to be hydrate, formed by 
water contained in the gas and vessels, but some of the yellow 
fluid was also produced. As this however might also con- 
tain a portion of the water present, a perfectly dry tube and 
apparatus were taken, and the chlorine left for some time 
over a bath of sulphuric acid before it was introduced. Upon 
throwing in air and giving pressure, there was now no solid 
film formed, but the clear yellow fluid was deposited, and 
more abundantly still upon cooling. After remaining some 
time it disappeared, having gradually mixed with the atmo- 
sphere above it, but every repetition of the experiment pro- 
duced the same results. 
