Penny Blood: Serial Sensation and Working-Class Entertainment — page 132: what you’re looking at

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

CH. Xx. | DISTURBED TRACT. II§ And BB ="—P 5, But if we suppose an ocean OO, of depth & and density yp, to cover the crust, we must add the pressure of the ocean to that of the crust and then BD= ah | And BB ="—P £8, oC To avoid circumlocution, we shall in future call the portion of the crust AB, which has been either partially or generally compressed, and disturbed from its original position between AC and BD, “the tract.” We shall also make a fresh supposition about the levels, above and below which > (a) &€c. are measured ; no longer re- garding them as what would have been the upper and under surface of the crust if it had been perfectly compressible in a horizontal direction; but now, as “mean levels,” above and below which the tract is disturbed as compared with undis- turbed regions. The consequence of this alteration will be, that when a volume # is depressed into the fluid, 1t will not follow that an equal volume «@ will rise into the anticlinals, because the positions of the mean levels themselves will be affected. Hence 2 (a) will not be equal to 2 (8), and we cannot say that 2 (a) — 2 (5) is equal to Ke. Supposing no attachment at AC and BD, if there be equili- brium of the whole as a rigid mass, we must have two conditions fulfilled, (1) that the weight of the fluid displaced equals the weight of the whole-mass, and (2) that the centre of gravity of the whole mass is vertically above that of the fluid displaced. 8—2 SS (CO) GONG oOo