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[Lock N. <sn...@uk...>]

Lls these bones with a very light gas, which is formed by an action of
its lungs in drawing in air. We have adapted this principle in the wings
and fuselage of this little machine. They are airtight and filled with
compressed helium-gas, which is non-inflammable and nearly as light as
its highly volatile rival, hydrogen-gas." "Hydrogen-gas is surely a
dangerous commodity around fire," said Mr. Giddings. "I understand that
when the big English dirigible R-34 came across the Atlantic last summer
she was filled with hydrogen, and that her commander and crew all wore
felt-soled shoes, so that they would not by