114 Dr. Kane on the Combinations derived from Pyroacetic Spirit. 



the ratio of the oxygen in the united bases being to that of the acid as three to 

 five. 



IX. OF THE PHOSPHO-MESITYLIC ACID. 



When glacial phosphoric acid is mixed with its own weight of mesitic alcohol, 

 considerable heat is evolved, and the mixture becomes dark-brown. On neu- 

 tralizing this liquor with a base, a soluble phospho-mesitylate is obtained, but 

 iii" very small quantity. The phospho-mesitylate of soda crystallizes in fine 

 rhomboidal plates ; exposed to the air the crystals become opaque, owing to the 

 loss of a certain quantity of water by efflorescence. When heated, they melt in 

 their water of crystallization, leaving a white mass ; and this, when heated more 

 strongly, froths up, blackens, and finally bums, leaving a white residue of phos- 

 phate of soda. 



The small quantity of this salt which I had obtained prevented me from 

 analyzing it further than by determining the quantity of water and of phosphate 

 of soda which it contained. 



0.379 of the crystallized salt, when warmed cautiously until it ceased to give 

 off watery vapour, but remained quite white, weighed 0.295; and having been 

 then ignited, gave 0.185 phosphate of soda, corresponding to 



Water =22.2 



Phosphate of soda = 48.8 ■ 100.00. 

 Organic matter = 29.0 . 

 The formula p^ Oj -\- Cg Hg o^ -\- nog -j- 5 ho gives 

 Phosphate of soda = 49.7 

 Mesitic alcohol = 28.4 • 100.00. 

 Water =21.9 



As an atom of water remained behind with the mesitic ether, it may be con- 

 sidered that the phosphoric acid has three atoms of base and five of water of 

 crystallization. The formula is 



1*205+ jNaO + CeHsO + HOj -f- 5hO. 



A more detailed examination of these different classes of salts would be a very 

 useful subject for the attention of other chemists. 



