"Why not?"
"Because we do not yet know of what metal it will be made."
"Let us decide that without delay."
"I was going to propose it to you."
The four members of the committee each swallowed a dozen sandwiches, followed by a cup of tea, and the debate recommenced.
"Our cannon," said Barbicane, "must be possessed of great tenacity, great hardness; it must be infusible by heat, indissoluble, and inoxydable by the corrosive action of acids."
"There is no doubt about that," answered the major, "and as we shall have to employ a considerable quantity of metal we shall not have much choice."
"Well, then," said Morgan, "I propose for the fabrication of the Columbiad the best alloy hitherto known—that is to say, 100 parts of copper, 12 of tin, and 6 of brass."
"My friends," answered the president, "I agree that this composition has given excellent results; but in bulk it would be too dear and very hard to work. I therefore think we must adopt an excellent material, but cheap, such as cast-iron. Is not that your opinion, major?"
"Quite," answered Elphinstone.