As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.

正如几何学最自然的起点是数学点，在观察和自然历史中采用同样的方法也最真实、简单且富有教益。

The truth is, the science of Nature has been already too long made only a work of the brain and the fancy: It is now high time that it should return to the plainness and soundness of observations on material and obvious things.

事实上，自然科学长期以来只是大脑和想象力的产物：现在是时候回归到对物质和显而易见事物的朴素而健全的观察上了。

By the help of microscopes, there is nothing so small as to escape our inquiry; hence there is a new visible world discovered to the understanding.

借助显微镜的帮助，没有什么小到能逃脱我们的探究；因此，一个新的可见世界向我们的理解力敞开了。