316 CondcusatiunofGuso!. into Liquids. 



sent. And when we take into consideration the immense saving 

 in the consnmption and tonnage of coals, we are of opinion 

 that Mr. P.'s invention will infinitely extend the use of the 

 steam-engine in navijration. — Museum. 



CONDr.XSATION OF GASES INTO LIgUIDS, 



Mr. Faraday has succeeded in condensing chlorine into a 

 Hquid : for this purpose a portion of the solid and dried hy- 

 drate of chlorine is put into a small bent tube and hermetically 

 sealed; it is then heated to about 100, and a yellow vapour is 

 formed which condenses into a deep yellow liquid heavier than 

 water (sp.gr. probably about 1.3). Upon relieving the pres- 

 sure by breaking the tube, the condensed chlorine instantly 

 assumes its usual state of gas or vapour. 



When perfectly dry chlorine is condensed into a tube by 

 means of a syringe, a portion of it assumes the liquid form 

 under a pressure equal to that of 4 or 5 atmospheres. 



By putting some muriate of ammonia and sulphm'ic acid 

 into the opposite ends of a bent glass tube, sealing it hermeti- 

 cally, and then suffering the acid to run upon the salt, muriatic 

 acid is generated under such pressure as causes it to assume 

 the liquid form ; it is of an orange- colour, lighter than sulphu- 

 ric acid, and instantly assumes the gaseous state when the 

 jnessure is removed. Sir H. Davy has given an account of this 

 experiment to the Royal Society. 



By pursuing this mode of experimenting, sulphuretted hy- 

 drogen, sulphurous acid, carbonic acid, cyanogen, euchlorine, 

 and nitrous oxide, have been also found to assume the liquid 

 form under pressure, and to appear as limpid and highly mobile 

 fluids. It is probable that other gases may be condensed by 

 similar means, and that nitrogen, oxygen, and even hydrogen 

 itself, may yield, provided suflicient pressure can be connnanded. 

 Some of Mr. Perkins's experiments render it more than pro- 

 bable that atmospheric air under a pressure of some hundred 

 atmospheres changes its form ; and it is not unlikely, that some 

 very curious and interesting results may be obtained by the aid 

 of a slight modification of die apparatus used by that gentle- 

 man in his researches connected with high pressure steam. — 

 Qiiartciiy Journal. 



To the Editors of the Philosophical Magazine. 



Some very interesting facts lately published, seem to con- 

 firm the supposition, that all gases may be reduced to a liquid 

 or solid form. I have long had experiments in view for this 

 purpose, thinking it probable that they will change their state 

 by the joint application of pressure and cold, but have not found 



leisure 



