US$ 945.20
View west towards London Bridge and St Paul's Cathedral from a boat moored near the Tower of London
View of Billingsgate wharf with oyster boats
from Leadenhall Street'
11th February 1967
A terrella Size:L: 70 x 70cm View west towards London BridgeA terrella ('little earth') is a sphere made of a magnetized substance, used to simulate the magnetic field of the earth. In the 16th century the English physician William Gilbert used a terrella made out of lodestone (a naturally occurring magnetized mineral) to demonstrate that the earth is magnetic, and to explain how mariner's compasses work. 17th century