Abstract
Summary The bronze pendulum apparatus of the Dominion Observatory was used during 1958 to determine gravity values at five locations in Western Canada. The standard deviations obtained are due chiefly to drifts of up to 3 parts in 107 in the frequency standard and to errors of 1 or 2 parts in 107 which arise during the scaling of the photographic records. It is believed that the control over temperature and pressure is such as to preclude all but negligible errors. A small correction is necessary for variations in arc, but the error in this is also considered negligible. The spreads in determinations of pendulum periods appear to be at least comparable to results obtained by other observers in recent years. Relative to the adopted value of 980.62200 cm/s2 for the National Reference Station, the following gravity values have been obtained: Winnipeg 980.9963 La Ronge 981.3949 Saskatoon 981.1356 Estevan 980.8598 Regina 980.9588
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