Penny Blood: Serial Sensation and Working-Class Entertainment — page 129: what you’re looking at

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

II2 CRUST NOT FLEXIBLE. [cH. 1x. (1) .A vertical section of the lower surface of the crust, where it meets the liquid, when carried across a series of the corrugations, would present a series of festoon-like arcs approxi- ‘mating more or less to a circular form, concave upwards. (2) The anticlinals would be of cusp-like form, resulting from the intersection of contiguous festoons. There would not be found anything of the character of rolling undulations with flat-crested anticlinals. (3) The degree of curvature of the festoons would not depend upon the amount of the general compression, though their amplitude, or the distance from crest to crest, would be increased, under circumstances of equilibrium (#.e. where m, p. | 107, is integral), upon the compression being increased. The curvature would diminish upon the thickness being increased because r= 2 ok , (4) But the curve of equilibrium, even if it were once exactly established, could not be strictly maintained during successive contractions of the sphere, because we have seen that, in the case of a trough of given length, a flexible crust and a perfect liquid, equilibrium can only subsist for certain special amounts of contraction having relation to the length of the trough. No doubt the limits within which this would be possible would be enlarged by defects in flexibility and liquidity, and they would also be enlarged by a great increase in the length of the trough as compared to the thickness of the crust: for then m would always be nearly an integer. It can scarcely admit of a doubt that the results we have just obtained do not represent the case of nature. There is no reason to believe that the crust of the earth 1s flexed on the whole in such a manner, that a section carried across a series of anticlinals would give a series of circular arcs of the dimen- sions required by our results; and accordingly our assumptions cannot be in accordance with the facts, The radius = k, o beiug necessarily greater than p, 1s too small to suit the arrangement of the chains, COMiCOOokxS.conn