Penny Blood: Serial Sensation and Working-Class Entertainment — page 131: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

CHAPTER X. DISTURBED TRACT. Conditions of equilibrium of a disturbed portion of the earth’s crust—Probable result of compression—Part of the crust sheared upwards and part downwards— These separated by a ‘‘neutral zone”—Calculation of its position—Confused contortions in highly metamorphosed rocks explained—Depth of neutral zone —Probable thickness of crust—Prof. A. Favre's experiments on contortions — Inverted flexures—Formation of a mountain chain and its elevation above the ocean—Subsequent effects of denudation and accumulation of additional sediment —Consequent tilting of tract—Also general elevation from the same cause—Why areas of deposition are sinking areas—Degree of tilting depends upon width of tract and the existence of a mountain chain. In this chapter we shall consider the process of elevation of a mountain chain by horizontal compression under the condition of a certain degree of rigidity in the crust, without making any particular assumption regarding the cause of compression, as- suming only that it acts in a horizontal direction, and that the crust rests on a fluid substratum of greater density than its own. Under these circumstances, if a hole were made anywhere in the crust, the fluid would rise im it to a certain level, which we may call the effective level of the fluid. Let us as before call the density of the crust p, and that of the fluid ¢, o being greater than p. And let our sections be in ‘all cases supposed to be of unit of width. In the figure let A’B’b’ be the effective surface of the fluid, the crust beyond AC and BD being undisturbed by compression. Then by the principles of hydrostatics BoD="k. Co COLA @ NOOKS ACO