Quotes of All Topics . Occasions . Authors
It often happens that the mind of a person who is learning a new science has to pass through all the phases which the science itself has exhibited in its historical evolution.
Compare ... the various quantities of the same element contained in the molecule of the free substance and in those of all its different compounds and you will not be able to escape the following law: The different quantities of the same element contained in different molecules are all whole multiples of one and the same quantity, which always being entire, has the right to be called an atom.