[ 244 I 



According to Fourcroy, 4 An. Chy. 214, 150 grains aerated 

 magnefia, containing 48,66 per cent, mere magnefia, and confe- 

 quently in all 73 grains, were faturatcd by 222 grains of nitrous 

 acid, whofe fp. grav. appears to have been 1,5298, of which 100, 

 by my table, contain 69,88 real acid, and confequently 222 con- 

 tain 155 ; and if 73 grains mere magnefia take up 155 real acid, 

 100 grains mere magnefia Ihould take up 212. 



CHAP. 



