Penny Blood: Serial Sensation and Working-Class Entertainment — page 213: what you’re looking at

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

196 COMPRESSION AND VOLCANIC ACTION. (cu. xv. work against gravity in depressing the root will be g (o—p) [% a y o—p" Hence the whole work against gravity, which is the sum of these, will be a {e+ (o—p) aot [5 ae Now if M be the volume of the mountain, and m the height of. its centre of gravity above the upper mean level, | L dl = mM; and the work done against gravity will therefore be _P_ gp (1 + —~ ;) mM. Again, if A be the area of the fissure which is exposed to the pressure ¢t, and le the space through which it is opened by the action of ¢, then the work done by ¢ is tAke. But since the opening of the fissure gives rise to the eleva-. tion above and depression below the mean crust, it follows by equality of volumes that Ale = M+—°_ M. o—p Hence the work of compression is equal to t (a1 +—?. ) , o—Pp Consequently, work done against gravity _ gpm work of compression t If the fissure be closed above, this = oo i pk —oh 1 p. 187. COMIC OOOKS.EO