KE®AAH ME CHINESE MUSIC these two asses be set to grind corn. May, might, must, should, probably, may be, we may safely assume, ought, it is hardly questionable, almost certainly—poor hacks! let them be turned out to grass! Proof is only possible in mathematics, and mathematics is only a matter of arbitrary conventions. And yet doubt is a good servant but a bad master; a perfect mistress, but a nagging wife. “White is white” is the lash of the overseer; ‘‘white is black” is the watchword of the slave. The Master takes no heed. 58