1874Valentia to Newfoundland1,900
United States vessels have lately been employed in taking soundings for the Pacific cable.
When this line of telegraph is laid, its length between the terminal points, namely, San Francisco and Yokohama, will be 5,573 nautical miles.
The cable will, however, be divided into three sections, — from San Francisco to Honolulu, 2,093 miles; from Honolulu to Midway Island, 1,220; and from Midway Island to Yokohama, 2,260 miles.
a, Fig. 6243, is the Ohio River cable.
It is composed of an interior wire of No. 10 Swedish iron, surrounded by three coats of gutta-percha and three of Osnaburg, the whole inclosed in No. 10 longitudinal wires, and lashed with one of similar size.
b is the Hudson River cable.
It has three No. 10 conducting wires, each insulated by a gutta-percha covering inclosed in the same material, and is wrapped with tarred yarn.
c is an improvement on this, the wires being separated by solid gutta-percha incorporated in one