26 APRIL 1856, Page 12

Sm—Let " Astolfo" and Mr. Symons take two oranges, one

greater to represent the earth, one smaller to represent the moon. Let them place the greater on a table. Then let them run a needle through the smaller, having first made a mark on one side, or drawn a figure of the man in the moon upon it. Then let them pass the smaller round the large ,r keeping the man in the moon's eye always towards the greater orange. When they have completed the circuit, they will find that the small orange has turned once round the needle. This is the monthly rotation of the moon on her