Action Of Fresh And Salt Water On Ships

A striking illustration of the different effects of fresh and salt water on the hulls of ships was recently afforded by the steamei-s which ply on Loch Lomond when undergoing their annual overhaul. The woodwork of the vessels, as usual, showed signs of active deterioration, but so well does the fresh water of the loch preserve both iron hulls and boilers from corrosión and pitting, that, the maker's name upon the material of one of the vessels built thirty years ago, was found intact and perfectly clean and sharp. The inside of the boilers also were found extremely free from the deleterious coating of any kind. The effect of the sea water upon iron and steel is exactly the reverse of this, but the saline properties of the ocean tena to improve woodwork.