ABSTRACT It is common to assume that Descartes did not have a conception of an object's matter density independently of its size, but this is a rather incomplete assessment of the early modern natural philosopher's theory. Key to our understanding of Descartes's physics is a consideration of the ratios between the quantities of the different types of matter in which an object consists. As these ratios determine the degree of an object's porosity and elasticity, they also affect in Descartes's theory the phenomena of gravity and weight.

中文翻译：

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笛卡尔物理学中的“一种常见物质”：物质数量、重量和重力的笛卡尔概念

摘要 通常假设笛卡尔没有独立于物体大小的物体物质密度概念，但这是对早期现代自然哲学家理论的相当不完整的评估。我们理解笛卡尔物理学的关键是考虑构成物体的不同类型物质的数量之间的比率。由于这些比率决定了物体的孔隙度和弹性的程度，它们也会影响笛卡尔理论中的重力和重量现象。