[ ^87 ] 



tween Mr. Morveau's refult and that of my cnlculation is 8.61 

 grs. ; the reafon, however, is^obvious ; M »rveau employed acetixd 

 barytes, this acid rendered part of the acid fulphureous, as is well 

 known ; the fulphureous acid does not decompofe acetited barytt g 

 per Bergman's table, his other experiments on the fulphureous acid 

 cannot therefore apply. 



Of the Table of Nitrous Acid. 



Though this acid was not exaftly oxyginated and colourlefs, yet 

 it was far from being fully de-oxyginated, but in that pale red flate 

 in which it commonly aj^ears ; what changes the variety of oxygi- 

 nations may produce I have not experienced ; the refults are not 

 quite fo accurate as mofl of thofe in the table of vitriolic acid, 

 partly from the eruption of vapour during the weighing, and partly 

 from the diforder the fumes caufe at long run in the fcales ; but 

 the error in the quantity of real acid in 100 parts of the acid li- 

 quor,* no where, as far as I have had occafion to examine, amounts 

 to I per cent, or at leafl: does not exceed that amount ; the lower 

 part of the table I found mofl; faulty, and have redified the 

 errors to a great degree. 



Experiment \Jl. 



To 400 grs. of -nitrous acid, whofe fp. grav. at d^)" '^^^ ^''^995» 

 Hahn added 200 of water, and when the whole was cooled down 

 to 64° he found the fp. grav. to be 1,31 57. 



A a 2 Application. 



