Elements of the graph are shown from an axis through 0 and at right angles to OX.
The graph will then be made up of a succession of parallel lines.
The assemblage of ordinates NP is then the graph of Y.
If, for instance, the graph were a trapezium, the calculation of the area would be equivalent to finding the integral, from x=a to x=b, of an expression of the form px+q.
If we assume that the bolograph of solar energy is simply a graph of amorphous radiation from an ideal radiator, so that the con- Temperature stants cl, c 2, of Planck's formula determined terrestrially apply to it, the hyperbola of maximum intensity is XO = 2, 921 X 10 7; and as the sun's maximum intensity occurs for about X =4900, we find the absolute temperature to be 5960° abs.
There are also cases in which graphics and mensuration are used jointly; a variable numerical quantity is represented by a graph, and the principles of mensuration are then applied to determine related numerical quantities.
When the series is theoretically continuous, the theoretical graph will be a continuous figure of which the lines actually drawn are ordinates.
The question of constructing a telegraph in Persia as a link in the overland line to connect England with India was broached in Teheran by Colonel Patrick Stewart and Captain Anglo- Champain, officers of engineers, in 1862, and an agreeIndian Tele~ment on the subject concluded by Edward Eastwick, graph Line.
The latter relation shows that the bending moment varies as the area cut off by the ordinate in the graph of F.
The graph of F is a straight line; that of M is a parabola with vertical axis.