As Being in the Domain of Logic. 
55 
system of things is the substance of all being, ordered in the 
unity of reason, and the student of that system has the limita¬ 
tion of his science in the reason out of which it comes and by 
which its boundaries are set. We shall go on in glad and 
tremulous surprise, multiplying our sciences and reviewing their 
conclusions, disappointing the tears we shed for no more fields 
of study, but always within, and never in the depth and number 
of sciences transcending, limits, though hard to find, of a rea¬ 
sonable universe which, while some smile at the mention of it, 
would seem, if we now had vision of it, radiant with absolute 
beauty, even the feeble vision of which the great spiritual souls 
of the world have been ravished with. 
B. In the same way logic prescribes to the sciences the law of 
their several spheres. To the majority of minds when asked the 
reason why the facts of the atomic and molecular movement are 
grouped together in a specific system of thought called chemis¬ 
try, the appropriate answer would seem to be, that the facts in 
question were substantially alike, as being atomic and molecular. 
We might call this a physical reason. A higher grade of mind 
would give a physiological reason, in the larger meaning of the 
word physiology, and say, it was because the facts were alike 
in being the performing of the same function in the organic 
structure of the world. But both these answers, mediate in 
their nature, are only perhaps an unconscious recognition of a* 
sovereign though undemonstrable, because absolute, law which 
holds the mind in the procedure of reason, furnishing an answer 
to our question, which is ultimate. Why does the chemist place 
the movements of the atoms and the movements of the molecules 
in groups and the modifications of these in groups subordinate, 
and make them in certain order one department, calling it 
chemistry? And why in the other view, why, when the student 
finds a field of facts atomic and molecular, in the living system 
of the universe, serving identical uses physiologically in the 
economy, does he put them therefore apart in a hierarchy of 
concepts and call the world’s ownership of them a science? They 
will tell you: “Because it is a reasonable procedure,” intimat¬ 
ing thereby that as the universe is in the ground of reason 
which orders it as one in order of reason, as reason is one, so 
