The juice of the flesh is alkaline or neutral to test paper.
It is then found to be acid to test paper, and to have a very disagreeable and tainted flavour.
A portion of the test paper is moistened with a solution of glycerin to render it more sensitive than the dry part.
The test paper will indicate its presence, even before it has time to act upon the glass.
These solutions containing the bodies causing instability are neutral to test paper, but become acid upon evaporation by heating.
It has great refracting power and a burning taste; when pure it is neutral to test paper.
The strips of test paper are torn out and dipped in the milk.
This solution is alkaline to test paper, and by evaporation leaves crystals, which are wholly dissipated by heat.