Because it has misled me once, is that any reason why I should accept without criticism anything, however far-fetched, which this man may care to put forward? Are we to have a Pope of science, with infallible decrees laid down ex cathedra, and accepted without question by the poor humble public? I tell you, sir, that I have a brain of my own, and that I should feel myself to be a snob and a slave if I did not use it. If it pleases you to believe this rigmarole about ether and Frauenhofer's lines upon the spectrum, do so by all means, but do not ask one who is older and wiser than yourself to share in your folly. Is it not evident that if the ether were affected to the degree which he maintains, and if it were obnoxious to human health, the result of it would already be apparent upon ourselves?" Here he laughed with uproarious triumph over his own argument. "Yes, sir, we should already be very far from our normal selves, and instead of
