Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 817
re are nume-rous bodies which, though leaving the retort in the gaseous form, imme-diately assume the liquid or solid state at ordinary temperatures. All suchsubstances must be separated before permanent gases are obtained fit forilluminating purposes and capable of being carried through pipes to… … ^J^^^-i
Inventions
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