Carat 

The carat (spelt karat in the U.S., to distinguish it from the unit of mass above) is also a measure of the purity of precious metals such as gold. One carat in this sense is one-twenty-fourth purity. Therefore 24 carat gold is pure gold, 12 carat gold is 50% purity, etc.

For only one did the vast frame supply- Like the sun's disk or like a Grecian shield. This vengeance follow'd for our slaughter'd friends. Your cables cut, and on your oars rely! A hundred more this hated island bears: Like him, their herds on tops of mountains keep; And now three moons their sharpen'd horns renew, I drag my loathsome days with mortal fright, Oft from the rocks a dreadful prospect see From far I hear his thund'ring.html">ring.html">ring voice resound, Cornels and salvage berries of the wood, While all around my longing eyes I cast, On those I fix'd my hopes, to these I run; What other death you please, yourselves bestow.' "Scarce had he said, when on the mountain's brow His following flock, and leading to the shore: His staff a trunk of pine, to guide his steps aright. His woolly care their pensive lord attends: Soon as he reach'd the shore and touch'd the waves, He gnash'd his teeth, and groan'd; thro' seas he strides, The cables cut, and silent haste away; Then, buckling to the work, our oars divide the main. But, when our vessels out of reach he found, Th' Ionian deep, and durst no farther wade. Shakes earth, and air, and seas; the billows fly The neigh'ring Aetna trembling all around, His brother Cyclops hear the yelling roar, We saw their stern distorted looks, from far, A dreadful council, with their heads on high; Not yielding to the tow'ring tree of Jove, New pangs of mortal fear our minds assail; And take th' advantage of the friendly gale. Charybdis' gulf, nor dare to Scylla run. We, tacking to the left, are free from fears; .

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