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TWO:Another difference between solid and expanding dies, which may be pointed out, is in the firmness with which the cutting edges are held. With a solid die, the edges or teeth being all combined in one solid piece, are firmly held in a fixed position; while with expanding dies their position has to be maintained by mechanical devices which are liable to yield under the pressure which arises in cutting. The result is, that the precision with which a screwing machine with movable dies will act, is dependent upon the strength of the 'abutment' behind the dies, which should be a hard unyielding surface with as much area as possible.We cannot tell to what extent the divergences which afterwards made Plato and Aristotle pass for types of the most extreme intellectual opposition were already manifested during their personal intercourse.172 The tradition is that the teacher compared his pupil to a foal that kicks his mother after draining her dry. There is a certain rough truth as well as rough wit about the remark; but the author of the Parmenides could hardly have been much affected by criticisms on the ideal theory which he had himself reasoned out with equal candour and acuteness; and if, as we sometimes feel tempted to conjecture, those criticisms were first suggested to him by Aristotle in conversation, it will be still more evident that they were received without offence.173

TWO:Balmayne came with his burden, which he flung in and covered with a rug. He pulled at the lever, and the great machine started, and then dragged, as if some great weight was hanging on behind.