Description
Geodesist and metrologist Henry Kater (1777-1835) invented Kater's pendulum in 1817 which enabled the strength of gravity to be determined
11th April 1962
with a lamppost
walked on a tightrope over the Niagara Falls
Hvar Town & Harbor mb-code BORGM_1998_6 Geodesist and metrologist Henry Kater
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