gravimetry
The pendulum apparatus of Vening Meinesz, “Slingerapparaat van Vening Meinesz,” also known as “the Golden Calf. Positioned on the left side is the protective casing with the recording instrument on top. On the right side is the pendulum apparatus with the three pendulums at the back. Built in 1923, the instrument has been in the collection of the Delft University of Technology since 1966 and, in its time, had made over 500 submarine dives