 …why may we not say, that the Form of a Body, being made up of those Qualities united in one Subject, doth likewise consist in such a Convention of those newly nam’d Mechanical Affections of Matter, as is necessary to constitute a Body of that Determinate kind. And so, though I shall for brevities sake retain the word Forme, yet I would be understood to mean by it, not a Real Substance distinct from Matter, but onely the Matter it self of a Natural Body, consider’d with its peculiar manner of Existence [corpuscular structure], which I think may not inconveniently be call’d either its Specifical or its Denominating State, or its Essential Modification, or, if you would have me express it in one word, its Stamp: for such a Convention of Accidents is sufficient to perform the Offices that are necessarily requir’d in what Men call a Forme, since it makes the body such as it is, making it appertain to this or that Determinate Species of Bodies, and discriminating it from all other Species of Bodies whatsoever…. (Boyle 1666, p. 324.)