Penny Blood: Serial Sensation and Working-Class Entertainment — page 48: what you’re looking at

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

cw. 11.]| INTERNAL DENSITIES AND PRESSURES. 3! PRESSURES ACCORDING TO WALTERSHAUSEN. RADIUS. | ATMOSPHERES. 1-00 0 0-99 17188 0-98 84591 0-97 53070 0-96 72195 0-95 92432 0-94 113180 0:98 134600 0-92 156840 0-91 179680 0-9 203320 0:8 471680 0-7 786080 0-6 1125690 0-6 1468000 0-4 1701500 0-8 2297500 0-1 2441900 0-0 2492600 It is an interesting enquiry what the fluid pressure would be according to Laplace’s law of density now assumed. For the actual pressure is probably not very different from the fluid pressure ; because, if the rigidity of the interior be due to pressure, it will have been fluid at any given level until the temperature had fallen sufficiently for the pressure to overcome the fluidity, so that the pressure there will be the fluid pressure. But even if that be not a true account of the process of solidi- fication, still it is not probable that the couches can be appreciably supported in the manner of an arch; in which case we may consider the pressure at any point in a prism from the surface to the centre to be due to the weight of the portion of the prism above the level under consideration’. Let p be the pressure at the distance r from the centre of the sphere, p’ the density and g’ the gravity at that level. Then as r is increased p is diminished, and we shall have d ro +t =—9'p eéeees Coeccececce peeecvee> (1). 1 At Dukinfield colliery at 2500 ft. circular arches of brick, probably five to six feet in diameter, and four feet thick, were crushed. Hull’s ‘‘Coal Fields of Great Britain,” p. 447, quoted in “ Jour. of Science,” No. xxxrx, COLA @ DOO (CO)