The Dominion Observatory's Earth Physics and Time Keeping Functions, part 4 by Randall Brooks Earth Physics The Dominion Observatory had another mandate — rather than looking up from the Observatory dome, some staff went to the basement to study gravity and seismic activity. The Observatory became part of a growing worldwide network of centres with seismographs to detect earthquakes and to combine the information to determine the location of the seismic activity. The Museum has a couple of early