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Integrating the time services
The rise of the Dominion Observatory
The evolution of astronomical techniques
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adjusted Archives of Canada Astron astronomical atomic atomic standard ball beats broadcast C.C. Smith C.H. McLeod Canadian Carpmael centre cesium standard chronograph chronometer circuit Cooke transit correct crystal oscillator daylight saving Denison Department of Marine determined director Dominion Observatory electric equipment error feet Fredericton Greenwich Halifax hertz hour installed International J.P. Henderson Kingston laboratory later latitude longitude machine magnetic Marine and Fisheries McClenahan McGill Observatory mean solar measured meridian circle Meteorological micrometer millisecond minute monitoring Montreal moon mounted operation oscillator Ottawa output pendulum Plate position precision Public Archives Quebec R.M. Stewart radio time signals railway received recorded relay Saint John seconds pulses Sessional Paper sidereal clock speaking clock stars station Stupart survey synchronism telegraph timekeeping tion Toronto transit instrument transit observations transit telescope transmission transmitter tube Vancouver vatory Victoria wire wireless zenith