Penny Blood: Serial Sensation and Working-Class Entertainment — page 78: what you’re looking at

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

cH. vI.] HYPOTHESIS OF SOLID!ITY. 61 Let ABDC be a section of a portion of:the crust of length / and depth &. Then e is the mean coefficient of compression for the whole, which will depend upon the depth to which the cooling down to the melting temperature under pressure has advanced. The area which by its having become compressed will have gone to form the corrugations AF'B will be BDE, in which BE is the quantity by which AZ has been compressed, while CD has not been compressed at all. , Then if BM =a, and c=the compression at the depth z, MQ =le. And khle = area BED, k = | cdx. 0 We now require to express c in terms of z. For this purpose we avail ourselves of Sir Wm. Thomson’s paper “On the Secular Cooling of the Earth,” using the symbols and formule, and the diagram there given slightly altered, but not necessarily adhering to his values of the con- stants. In the event we think it will appear that we must Diagram altered from Sir W. Thomson’s paper ‘‘On the Secular Cooling of the Earth.” ON the depth below the surface=x2. NP the excess of tempera- ture at that depth above the temperature of the surface=v. Og the excess of the melting temperature above that of the surface = V, 5 N 3 a Za | g , x 4 00U% GONG oOo SS (CO)