The New York-Chicago line, built in 1892, is of wire 165 millimetres in diameter (No.
The scale is generally divided into hundredths of millimetres or thousandths of inches.
A large number of specimens of a species are usually found together, since their only mode of spreading is during the ciliated larval stage, which although it swims vigorously can only cover a few millimetres an hour; still it may be carried some little distance by currents.
Tachinoides, to about i i z millimetres in that of G.
Geissler (1815-1879) containing air, carbonic acid, hydrogen, &c., under a pressure of one or two millimetres, exhibit beautiful appearances when traversed by the high tension current produced by the secondary circuit of an induction coil.