Transactions . Per Cent Zinc Diagram, showing Method of Plotting Three Variables withRectangular Co-ordinates. he line represent per cent, of tin; the upper part (GK) repre-ent per cent, of zinc, and the middle part (PG) per cent, of cop-ter. Then arrange the vertical lines along OX so that the ab- Fig. Diagram, showing all Three Variables Measured by the same Scale(Isosceles Right-Angled Triangle). ic£8sae also shall represent the percentage of zinc (>.e., OE = per-:entage of zinc). We have now the per cent, of zinc represented)y two separate means, one of which is superfluous: and we
Transactions . Per Cent Zinc Diagram, showing Method of Plotting Three Variables withRectangular Co-ordinates. he line represent per cent, of tin; the upper part (GK) repre-ent per cent, of zinc, and the middle part (PG) per cent, of cop-ter. Then arrange the vertical lines along OX so that the ab- Fig. Diagram, showing all Three Variables Measured by the same Scale(Isosceles Right-Angled Triangle). ic£8sae also shall represent the percentage of zinc (>.e., OE = per-:entage of zinc). We have now the per cent, of zinc represented)y two separate means, one of which is superfluous: and we 860 BLAG-CONSTITUTION, STUDIED BY THI-AXIAL DIAGRAM. may accordingly dispense with the upper part of each vorticalline, reducing the diagram from a rectangle to the I riangle any point 1\ the abscissa DP (= OK) represents per cent, oizinc; the ordinate lK (= OD) represents per cent, of tin; and thedistance along the vertical line PG to the hypothenuse AB, peicent, of copper. The scales for the two quantities measuredalong the vertical lines are from the nature of the case the same,while the scale for the quantity measured hy the abscissae is thesame as for the other two only in the case of the isosceles right-angled triangle. It is desirable to have all three variablesplotted to the same sc
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
