four o'clock
The difference in these two times , or that of the chronometer and that of the sun , gives the distance in degrees and minutes , between the longitude of Greenwich and that of the place on the ocean where the observer is ; and that gives him his longitude . If the difference is three hours and twenty minutes , in time , the distance from Greenwich is fifty degrees of longitude , because the sun rises three hours and twenty minutes sooner in London , than in the fiftieth degree of west longitude . '' `` A watch is a watch , Rosy , '' put in the aunt , doggedly -- `` and time is time . -- When it 's four o'clock at our house , it 's four o'clock at your aunt Sprague 's , and it 's so all over the world . The world may turn round -- I 'll not deny it , for your uncle often said as much as that , but it can not turn in the way Mr. Mulford says , or we should all fall off it , at night , when it was bottom upwards . No , sir , no ; you 've started wrong . My poor , dear , late Mr. Budd , always admitted that the world turned round , as the books say ; but when I suggested to him the difficulty of keeping things in their places , with the earth upside down , he acknowledged candidly -- for he was all candour , I must say that for him -- and owned that he had made a discovery by means of his barometer , which showed that the world did not turn round in the way you describe , or by rolling over , but by whirling about , as one turns in a dance .