"No. That's not it," said Mallory. He frowned. Captain Algase had long
since wakened completely, was listening to his two juniors with glowing
pride. Now he cut the Gordian knot.
"Chromium," he suggested, "is fifty-two point one, Dan. The reverse of
the number that stumps you."
"Right! That's it, Skipper! And the meaning must be that the symbol is
to be written in reverse. 'Rc' instead of 'Cr.' There aren't enough
combinations to spell every word in the language unless you use some
subterfuges like that."
"Which makes the word," said Bud, "'forces.' Go on, pal...."