at the temperature 58', the feeond product, weighing 1 Ib. 1030 grs. - 
bitty: Fy 
Niirous Acid, 
In the diftillation of nitrous acid, as in that of marine, the firft 
portion is the heavieft, but, as the difiillation advances, the fpe- 
cific gravity of the products appears uniformly to diminifh. Two 
pounds of nitre were decompofed by one of concentrated vitriolic 
acid; the produ@ was divided into three portions, the two firft 
confifting of 3 ounce meafures each, the laft of 24; their fpecific 
gravities were as follow, 
I Bs = I 494. 
DE eae 1,485 
3 — 7 1,442 
As the vitriolic acid in this procefs is always in its moft con- 
centrated ftate, the caufe on which the increafed fpecific gravity 
of the laft portion of marine acid féems to depend cannot here 
operate. 
‘Folatile Alkalt. 
In diftilling cauftic volatile alkali, the firft portions that pafs in 
diftillation have the leaft fpecific gravity. In the procefs for 
cauftic volatile alkali, according to the Edinburgh Difpenfatory, the 
firft produ, amounting to 1 Ib. 100 grs. was found to be 1936: 
at 
