In size their cells are commonly about o ooi mm.
The mean result of the best determinations shows that when a current of one ampere is passed for one second, a mass of silver is deposited equal to o ooi i 18 gramme.
The value of the constant / 7 ranges in different metals from about o ooI to 0.04; in soft iron and steel it is said to be generally not far from 0.002.
But the Benedictines, whose settlement in Hungary dates from the establishment of their monastery at Pannonhalma (c. 1 ooi), were the chief pioneers.
Estimates of this distance vary, but it may probably be put at more than three thousand light years (parallax less than o ooi ").