He must have mortars, pots, filters, glasses and boxes clean and sweet.
The vats are fitted with filters made of coco-nut matting and jute cloth supported on wooden frames.
Through the time of both tyrants, he was, next to the actual rulers, the first man in Sicily; but of his record of his own times we have only what filters through the recasting of Diodorus.
The water from the melted snow forms a small lake at the bottom of the crater, from which it filters through fissures to the heated rocks below and thence escapes as steam or through other fissures to the mineral springs at the mountain's base.
Such filters are not, and in the nature of things cannot be, worked with the precision and continuity of a laboratory experiment.