the oxygenated muriatic Acid. 305 
EXPERIMENT VI. 
To half an ounce of the oxygenated muriatic acid, 
10 drops of the same alkali were added. It de- 
stroyed the colour of 125 grains of the acetite of 
indigo. 
EXPERIMENT VII. 
A mixture of half.an ounce of the oxygenated 
acid, and 15 drops of the alkali, destroyed the co- 
lour of 120 grains of the acetite of indigo. 
Though I had taken the precaution of avoiding 
the sulphuric acid, for the reason stated in the fore- 
going note, I was not quite satisfied with these ex- 
periments, on account of errors which might have 
taken place through a double affinity. I therefore 
‘made the following experiments, in which I em- 
ployed a decoction of cochineal in water, instead of 
the acetite of indigo. 
EXPERIMENT VIII. 
To half an ounce of the oxygenated muriatic 
acid, a decoction of cochineal was added till the 
acid ceased to act on its colour. It destroyed the 
colour of 390 grains of the decoction, 
EXPERIMENT IX, 
A repetition of Experiment vis. The colour 
of 385 grains of the decoction was destroyed in this 
experiment, 
VOL. Ys PP 
