Terrella

The terrella, or little earth, was an invention of William Gilbert in the 16th century. Ground from a lodestone, it simulated the magnetic dip of the Earth.

 
 

Browse articles alphabetically:
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | _ | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
 
 [an error occurred while processing this directive]