A Frenchman in Paris, M. de St. Simon Sicard, has recently contrived an apparatus for submarine exploration, apparently very similar in its principal features to the " armor " in common use for this purpose in the United States. It consists of a complete clc-thing of caoutchouc, including helmet and sack, enveloping the wearer from head to foot, and allowing him to descend below water without danger from contact with anything he may encounter. The helmet has a valve, which permits the air to escape at the moment of submersion; and no sooner is this submersion complete than the pressure of the water closes the valve hermetically. A provision of air to be inspired, is carried in a box, placed like a hump on the back of the diver. This box is furnished with a tube which carries the air into the helmet, in order thct the breathing may take place without difficulty and a little skp cock enables the distribution of the air to bereguiated at pleasure the instant respiration if performed with effort a signal can be made and the diver brought to the surface.
This article was originally published with the title "Walking under Water" in Scientific American 8, 44, 346 (July 1853)