"All matters from 'hydrogen' 6 to 'hydrogen' 3072 are to be found and play a part in the human organism. Each of these 'hydrogens' includes a very large group of chemical substances known to us, linked together by some function in connection with our organism. In other words, it must not be forgotten that the term 'hydrogen' has a very wide meaning. Any simple element is a 'hydrogen' of a certain density, but any combination of elements which possesses a definite function, either in the world or in the human organism, is also a 'hydrogen.'