參考翻譯：
　　The method of scientific investigation is nothing butthe expression of the necessary mode of working ofthe human mind: it is simply the mode by which allphenomena are reasoned about and given preciseand exact explanations. The difference between theoperations and methods of a baker weighing out hisgoods in common scales, and the operations of a chemist by means of his balance is not thatthe scales in the one case, and the balance in the other, differ in the principles of theirconstruction or manner of working; but that the latter is a much finer apparatus and ofcourse much more accurate in its measurement than the former.