Note 4 — THE DEVELOPMENT OF THE STEAMSHIP. By COMMANDER F. E. CHADWICK, U. S. NAVY.

The Naval Chronicle of 1818, vol. xxxix., p. 277, speaking of the steamers on the Clyde, says: “No serious accident has occurred since their introduction, which is more than two years. The secret of security consists in using large steam-engines of great power and small pressure. If the boilers of cast-iron should in any part give way, a piece of cloth is firmly wedged in the hole, and the vessel proceeds without any danger or inconvenience to the passengers.”