The plot of land extends on an axis from north-west to south-east over some 36,000 acres.
The purpose of his paper was to show that there is no problem if the axis is moved to the left.
The movable coil of the wattmeter is normally suspended so that its axis is at right angles to that of the fixed coil, and is constrained by the torsion of a spiral spring.
Elements of the graph are shown from an axis through 0 and at right angles to OX.
The swivel-head type of lamp will normally have an adjustable front shade portion that usually swivels along the horizontal and the vertical axis and allows you to control the direction of the light source.