(*a*) Data from five bacteria at 24.0°C were plotted on the same graph and marked with different symbols (with the data for the cell of Fig. 2 shown as filled circles). The regression lines were not constrained. The initial speeds of the cell bodies were 2.7, 4.7, 1.8, 3.1, and 2.8 Hz, and the initial speeds of the beads were 80, 175, 201, 233, and 271 Hz, respectively. (*b*) Data from the bacteria in *a* were plotted cumulatively by scaling the slow-speed axis to match slopes; see the text. The regression line was constrained to pass through the origin. (*c*) Data from six bacteria at 16.2°C were plotted on the same graph and marked with different symbols. The regression lines were not constrained. The initial speeds of the cell bodies were 5.0, 4.6, 2.6, 1.5, 2.8, and 3.2 Hz, and the initial speeds of the beads were 83, 110, 121, 130, 136, and 151 Hz, respectively. (*d*) Data from the bacteria in *c* were plotted cumulatively by scaling the slow-speed axis to match slopes. The regression line was constrained to pass through the origin.

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