VINTAGE EARTHQUAKE DETECTION RING WITH 30 GLASS BALLS CLACKERS

AN UNUSUAL ITEM NOT SEEN EVERY DAY. A VINTAGE EARTQUAKE DETECTION RING CONSISTING OF 30 GLASS BALL CLACKERS. WITH THE SLIGHTEST MOVEMENTS THE GLASS BALLS START TO RATTLE AND CLACKLE.
 
SIZE: 2CM HIGH 20CM DIAMETER
 
CONDITION: NOT SURE IF IT NEEDS ANOTHER GLASS MARBLE BUT AS IT STANDS IT RATTLES AT THE SLLIGHTEST MOVEMENT OR VIBRATION.
 
The earliest seismoscope was invented by the Chinese philosopher Chang Heng in A.D. 132. This was a large urn on the outside of which were eight dragon heads facing the eight principal directions of the compass. Below each dragon head was a toad with its mouth opened toward the dragon. When an earthquake occurred, one or more of the eight dragon-mouths would release a ball into the open mouth of the toad sitting below. The direction of the shaking determined which of the dragons released its ball. The instrument is reported to have detected an earthquake 400 miles away that was not felt at the location of the seismoscope. The inside of the seismoscope is unknown: most speculations assume that the motion of some kind of pendulum would activate the dragons.
 
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