Cohesion of solid parts and Impulse, the primary ideas peculiar to Body.
The primary ideas we have PECULIAR TO BODY, as contradistinguished to spirit, are the COHESION OF SOLID, AND CONSEQUENTLY SEPARABLE, PARTS, and a POWER OF COMMUNICATING MOTION BY IMPULSE.

These, I think, are the original ideas proper and peculiar to body; for figure is but the consequence of finite extension.
18.

Thinking and Motivity The ideas we have belonging and PECULIAR TO SPIRIT, are THINKING, and WILL, or A POWER OF PUTTING BODY INTO MOTION BY THOUGHT, AND, WHICH IS CONSEQUENT TO IT, LIBERTY.

For, as body cannot but communicate its motion by impulse to another body, which it meets with at rest, so the mind can put bodies into motion, or forbear to do so, as it pleases.

The ideas of EXISTENCE, DURATION, and MOBILITY, are common to them both.
19.