Barry MacDonald, President of the Nova Scotia Lighthouse Preservation Society went out to Race Rocks with Garry today. Barry has been instrumental in getting the Lighthouse Heritage Protection Bill  through parliament and working for the protection of the Atlantic Coast Lighthouses: http://www.racerocks.com/racerock/history/heritagetower.htm#Anchor-Pat-11481 .  In this picture, he tells us about how the Air Chime Fog horns were once used across North America, but are now all discontinued.The one he is examining was removed for the installation of solar panels and has since been replaced, preserving the look of the four air chimes on the energy building.
http://www.racerocks.com/racerock/history/foghorn/foghorn.htm