30 10.31 .4059 35 10.86 .4275 40 11.35 .4468 45 11.82 .4653 50 12.23 .4815 60 13.00 .5118 70 13.38 .5386 80 14.30 .5630 90 14.89 .5862 100 15.42 .6071 125 16.60 .6535 150 17.63 .6941 200 19.41 .7641 300 22.22 .8748 400 24.46 .9630 500 26.35 1.0374 The new and finer analytical balances weigh to the tenth part of a milligram, the two thousandth part of a carat, the five hundredth part of a grain; but this is not necessary. If the 200–milligram carat were used, the two hundredth part of a carat could readily be ascertained, and then a short-beam, rapid-weighing balance would answer every purpose and save much time for the dealer who must make many weighings in the course of a day. In an office where thousands of weighings were made in a month, the task was accomplished with such minute accuracy that the margin of error did not exceed one carat during that time. The _mina_, the sixtieth part of the lesser Alexandrian talent of silver, was divided by the Romans, when they occupied Egypt, into twelve ounces (_unciae_), and, weighing as it did 5460 grains, it became the predecessor of the European pounds of which the troy pound is a type. If we may believe a Syrian authority, Anania of Shiraz, who wrote in the sixth century, the carat or diamond weight was originally formed from one of these ounces by taking the 1⁄144 part.[380] We find in Murray[381] that the Greek κεράτιον was originally identical with the Latin siliqua, and was called the _siliqua Graeca_. As a measure of weight and fineness the carat represents the Roman siliqua as 1⁄24 of the golden solidus of Constantine, which was ⅙ of an ounce, hence the various values into which 1⁄24 and 1⁄144 enter, or originally entered. As a measure of weight for diamonds and precious stones, it was originally 1⁄144 of an ounce or 3⅓ grains. It is stated in Hakluyt (Voy. II, pp. 1, 225, 1598): “Those pearls are praised according to the caracts which they weigh; every caract is four graines.”