| Description | Slide shows a table of 'composition of some typical natural waters'.
The table has two columns. Column 1 shows the following waters: 'Sea water', 'Hard freshwater', and 'Soft freshwater'. Column 2 is labelled 'gm. per litre', and shows the following elements: sodium (Na), potassium (K), calcium (Ca), magnesium (Mg), chlorine (Cl), sulphate compound (SO4) and carbonate compound (CO3).
Title of the table reads: 'Table I - composition of some typical natural waters'. |