A novel about time travel.Excerpt:"Don't have to keep count," he replied. "See that indicator?" he continued, pointing to a dial in the ceiling which had not been noticed before. "That reads May 3, 1898, now, don't it? Well, it's fixed to keep always tellin' the right date. It counts the whirls we make an' keeps tabs on every day we go backward. Any time all ye hev to do is to read that thing an' it'll tell ye jest what day 'tis."