Labor to make a Watch.

Mr. Dent, in a lecture delivered before the London Royal Institute, made an allusion to the formation of a watch, and stated that a watch consists of 992 pieces; and that 40 trades, and probably 215 persons are employed in making one of these little machines. The iron of which the balance wheel is formed, is valued at something less than a farthing; this produces an ounce of steel, worth 4 1-2 pence, which is drawn into 2,250 yards of steel wire, and represents in the market, 13l. 3s.; but still another process of hardening this originally a farthing's worth of iron, renders it workable into 7,050 balance springs, which will realize, at the common price, of 2s. 6d each 746l. 5s, the effect of labor alone. Thus it may be seen that the mere labor bestowed upon one farthing's worth of iron, gives it the value of 950l. 5s, or $4,552, which is 75,680 times its original value.