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# Long description

Figure 3 The horizontal axis of the graph is labelled 'percentage killed' and the values 0, 20, 40, 60, 80 and 100 are marked along the axis. The vertical axis is labelled 'log of dose / mg kg superscript -1'.

A curve has been drawn which starts near the bottom left and goes up and to the right. At a point above 10 on the horizontal axis, the line bends and then continues sloping up and to the right, but not as steeply as it was to begin with. At a point above 90 on the horizontal axis, the line begins to slope more steeply upwards, and ends near the top right corner of the graph.

A dashed line has been drawn which goes vertically up from 50 on the horizontal axis until it meets the curve. From this point another dashed line goes horizontally to the left until it meets the vertical axis. The point where it meets the axis is labelled 'log L D subscript 50'.