I had not thought of this fact, so far as I was aware, for many years; but in scrutinising the fleeting associations called up by the various words, I traced two mental visual images (an alembic and a particular arrangement of tables and light), and one mental sense of smell (chlorine gas) to that very laboratory.

From this to the chemical composition of sea water, the total salt about 3.5 per cent, but variable: the proportions of the various salts do not appear to differ, thus the chlorine test detects the salinity quantitatively.

Chlorine water or a solution of chloride of lime will remove fruit stains, and vegetable colors.