noon
The young inventor grinned . `` It 'll be simple enough when the control unit 's all put together , '' he replied . `` Just a single on-off switch and one test circuit . '' By noon , after working at a frenzied pace , the job was done . Tom thanked each one of the men personally . Then everyone went to eat lunch . After the meal , Hank Sterling asked , `` How about a detection test to see how she works ? ''