If we examine any other case of what is called the action of man upon nature,we shall find in like manner that the powers of nature,or in other words the properties of matter,do all the work,when once objects are put into the right position.

• 考察一下所谓人作用于自然的其他情况，我们同样会发现，一旦将物品置于适当的位置，自然力或换言之物质的性质，便会起作用。