108 Dr. Kane on Combitiations derived from Pyroacetic Spirit. 



V. COMBINATIONS OF MESITIC ETHER WITH THE OXYGEN ACIDS. 



When mesitic alcohol is mixed with twice its weight of strong oil of vitriol, 

 the mass becomes very hot, dark-brown, and much sulphurous acid gas is formed. 

 When the whole has cooled, it must be diluted with two or three volumes of 

 water, and neutralized by a base ; and when the carbonates of baryta, lime, or lead 

 are thus employed, there are formed soluble salts, which have been examined. 

 If the quantity of sulphuric acid employed had been smaller, similar salts are 

 produced ; but the substance found combined with the inorganic base is not the 

 bi-sulphate, but the neutral sulphate of mesityl. It appears even that the salts of 

 the proto-sulphate are those most easily formed, as I have sometimes obtained 

 them when I had employed a large quantity of oil of vitriol in order to form bi- 

 sulphate. The sulphate I shall call Sulpho-mesityllc Acid; and the bi-sulphate, 

 Persulpho-raesitylic Acid. 



VI. PERSULPHO-MESITYLATE OF LIME. 



This salt forms, when evaporated, a deliquescent granular mass, amongst which 

 small prisms are interspersed. It can be completely dried without blackening, and 

 thus loses one atom of water of crystallization. When heated strongly it takes fire, 

 blackens, and leaves after ignition a white residue reacting very feebly alkaline. 

 There is no acid whatsoever set free during the decomposition. 



A. 0.529 of salt was heated with some nitric acid in a platinum crucible ; the 

 decomposition went on very quietly, and there remained a perfectly white residue 

 of sulphate of lime, weighing 0.373, or 70.50 per cent. 



B. 0.972 material gave 



0.292 water, 

 0.651 carbonic acid; 

 or, per cent. 



Hydrogen = 3.33 

 Carbon =18.52 



The formula 2 so3-f-C6H50-l-2cao-{-HO gives 



