Includes shots of Dr. Andrew Thompson, former director of the Meteorological Service of Canada, unveiling a Historical Plaque commemorating Sir John Henry Lefroy, head of the Toronto Observatory from 1842 to 1853. Also in attendance were Toronto Mayor Nathan Phillips, Ontario Attorney-General Kelso Roberts H. Saunders, chairman of the Toronto Historical Board, Controller Jean Newman, Chairman of the Toronto Historical Board Leslie H. Saunders, and Professor G. F. G. Stanley of the Ontario Archeological and Historic Sites Board.
