rvard : permit achange at will of the length of the throw, and the “The logical utility of mathematics is not less obvious. travel of the valve by means of the eccentric, instead of ef- The prevelent distaste for mathematics, coéxisting, as it does, LOM fecting it through a link or any other device… … must ever remain one of its most indispensable implements. Once inured to the habit of accurately imagining abstract re- It may be considered as an eccentric with'n an eccentric lations, recognizing the true value of symbolic conceptions, the two eccentrics A and Bin the engraving being locked and…
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