six o'clock
How pure , sweet , and clean they all were ! The ceilings , walls , floors , and furniture , all of that marvelous metal , aluminum . Rugs laid about as required were the only covering upon the floors . At six o'clock , Sing announced dinner . As they repaired to the dining-room and sat in the dainty aluminum chairs about the aluminum table , set with a complete service of the same metal , they could not repress their expressions of delight . They sat with bowed heads while Dr. Jones invoked the Divine blessing upon the food of which they were about to partake , and asked His special protection and care during the unknown perils before them . As the meal progressed , they grew quite talkative and merry .