I consider nature a vast chemical laboratory in which all kinds of composition and decompositions are formed.

It required 85 parts by weight of oxygen and 15 parts of hydrogen to compose 100 parts of water.

Nothing is born, nothing dies.

Languages are true analytical methods.

Perhaps... some day the precision of the data will be brought so far that the mathematician will be able to calculate at his desk the outcome of any chemical combination, in the same way, so to speak, as he calculates the motions of celestial bodies.

As ideas are preserved and communicated by means of words, it necessarily follows that we cannot improve the language of any science, without at the same time improving the science itself; neither can we, on the other hand, improve a science without improving the language or nomenclature which belongs to it.

One succeeds in obtaining an equivalent production at a lower price by improving the arts, trades and agriculture and by developing the physical and moral qualities of workers, farmers and craftsmen.