138 On the Condensation of the Gases, $c. [1836. 



experiment, and was making it when Dr. Paris came into the 

 laboratory as he has described, and my thoughts at that moment 

 are embodied and expressed in my paper in the following words: 

 " I at first thought that muriatic acid and euchlorine had been 

 formed ; then that two new hydrates of chlorine had been pro- 

 duced ; but at last I suspected that the chlorine had been en- 

 tirely separated from the water by the heat, and condensed 

 into a dry fluid by the mere pressure of its own abundant 

 vapour *." I then describe an experiment entirely of my own, 

 in which I proceed to verify this conjecture, and go on to say, 

 " Presuming that I had now a right to consider the yellow fluid 

 as pure chlorine in the liquid state, I proceeded to examine its 

 properties, &c. &c. f" 



To this paper Sir Humphry Davy added a note J, in which 

 he says, " In desiring Mr. Faraday to expose the hydrate of 

 chlorine to heat in a closed glass tube , it occurred to me that 

 one of three things would happen : that it would become fluid 

 as a hydrate ; or that a decomposition of water would occur, 

 and euchlorine and muriatic acid be formed ; or that the chlo- 

 rine would separate in a condensed state." And then he makes 

 the subject his own by condensing muriatic acid, and states 

 that he had "requested" me (of course as Chemical Assistant) 

 " to pursue these experiments, and to extend them to all the 

 gases which are of considerable density, or to any extent 

 soluble in water;" &c. This I did ; and when he favoured me 

 by requesting that I would write a paper on the results, I began 

 it by stating " that Sir Humphry Davy did me the honour to 

 request I would continue the experiments, which I have done 

 under his general direction, and the following are some of the 

 results already obtained || :" and this paper being immediately 

 followed by one on the application of these liquids as mecha- 

 nical agents, by Sir Humphry Davy If, he says in it, "One of 

 the principal objects that I had in view in causing experiments 

 to be made on the condensation of different gaseous bodies, by 

 generating them under pressure, &c." 



* Phil. Trans. 1823, p. 162. f Ibid. p. 163. J Ibid. p. 164. 



Observe, not " to heat under pressure." See my remarks in the pre- 

 ceding page. 



|| Phil. Trans. 1823, p. 189, or Phil. Mag., First Series, vol. lxii.p.417 or 

 page 89. ^ Phil. Trans. 1823, p. 199. 



