from ἀντί and σῆρος, putrid, of σῆρος, I putrefy, an appellation given to such substances as resist putrefaction. We have some curious experiments in relation to antiseptic substances by Dr Pringle, who has ascertained their several virtues. Thus, in order to settle the antiseptic virtue of salts, he compared it with that of common sea-salt, which, being one of the weakest, he supposes equal to unity, and expresses the proportional strength of the rest by the higher numbers, as in the following table:

| Salts, their antiseptic virtue. | |--------------------------------| | Sea salt .................. 1 | | Sal gemma ................. 1+ | | Tartar vitriolated ....... 2 | | Spiritus Mindereri ....... 2 | | Tartarus solubilis ...... 2 | | Sal diureticus ............ 2+ | | Crude sal ammoniac ... 3 |

In this table the proportions are marked in integral num-