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 was not before. Other Instances there may be to shew, that by the same means the Quality may be notably varied as to degrees, or other not essential Attributes. And by some Instances also it may appear, that the Quality is Mechanically expell'd from, or abolish'd in, a portion of matter that was endow'd with it before. Sometimes also by the same Operation the former quality is destroyed, and a new one is produc'd. And each of these kinds of Instances may be usefully employ'd in our Notes about Particular Qualities. For, as to the first of them, there will be scarce any difficulty. And as to the second, since the permanent Degrees as well as other Attributes of Qualities are said to flow from (and do indeed depend upon) the same Principles that the Quality it self does; if, especially in bodies inanimate, a change barely Mechanical does notably and permanently alter the degree or other considerable attribute; it will afford, though not a clear proof, yet a probable presumption, that the Principles whereon the Quality it self depends are Mechanical. And lastly, if, by a bare Mechanical change of the internal Disposition and structure of a body, a permanent Quality, confess'd to flow from its substantial Form or inward Principle, be ab-