THE TERRESTRIAL GLOBE AT THE PARIS EXHIBITION. 747 



its surface would move at the rate of half a millimeter iu the second. 

 This movemeut would scarcely be visible, but it would, of course, rep- 

 resent an actual movemeut of the earth over half a kilometer iu the 

 same time. 



Fig. 2. 



A figure of the moon, corresponding- to this one of tlie earth, would 

 haveadiameter of 3.50 meters (IU feet), and would be 384 meters (about 

 a quarter of a mile) distant. A like figure of the sun would have a di- 

 ameter of 1,400 meters (4,593 feet, or nearly five-sixths of a mile), and be 

 distant about 150 kilometers (93 miles.) The diameter of a globe repre- 

 senting .Jupiter on the same scale would be one-half— that of a globe 

 representing Saturn on the same scale would be a little more than one- 

 third— of the height of the Eift'el Tower. 



This is not the first occasion on which an attempt has been made to 

 suggest by means of a great globe the size of the earth, and the extent 



