Protection of ships from lightning, according to principles established by Sir W.S. Harris, F.R.S., and approved after eighteen years' experience in the British navy : compiled from "Harris on thunder storms" and from a pamphlet published in 1847, by Harris, entitled "Remarkable instances of protection of certain ships of Her Majesty's navy," &c. &c. / - Harris, W. Snow ([publisher not identified],, 1848)