Xishe Mountain, Songjiang District.
Shanghai, China

"The oldest exhibit in the museum, this is an electromagnetic field detector made by London scientific instrument makers Elliott Bros. in 1879. There are only two of these left in the world, the other one is in the British Museum in London."

"Replica of the Houfeng seismometer. Invented in 132 A.D. by Han Dynasty astronomer and mathematician, Zhang Heng, it was the first seismometer in the world. It indicated the direction of an impending earthquake when the pearl in a dragon's mouth fell into that of the frogs' below."

"Further discretion is advised."