N attentive obferver will difcover fome properties in Matter that are fugitive and variable; others fixed and permanent under every condition and Circumfiance. By remarking thefe he Will come at length to difiinguilh the native properties that belong to it as matter, from the adventitious and afihmed. Af ter pafiing through a thoufand chang ing appearances, the Proteus hath been bound at la?: in the Chain of experi B ment,(2)