But any nearby traffic makes the mercury surface tremble, as it did in Hooke's cellar, so traffic must be avoided, or indeed any movement.
Kodwa izithuthi ezikufutshane zenza umphezulu wemetyhuri ungcangcazele, njengokuba kwabanjalo nakwisela kaHawke, uhambo zithuthi okanye nayiphina enye intshukumo mayiphetshwe.