6 Scientific American. [JANUARY 7, 1888. AN IMPROVED REMOVABLE BARREL HEAD. AN IMPROVED AIR SHIP. allowed to escape through the smoke stack in the regu- An efficient barrel head and fastening, which may be Two blowers are mounted in the locomotive cab, locked air and fluid tight in the barrel, the… … the other supplies air to a pipe which surrounds the BOEKLER’S BARREL HEAD AND FASTENING. connecting cords within easy reach. The strength one carrying off the products of combustion under the and character of the walls allow for great expansion of Boekler, of Mankato, Minn. A removable barrel head…
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