Penny Blood: Serial Sensation and Working-Class Entertainment — page 56: what you’re looking at

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

cu. iv.) LATERAL PRESSURE, ITS AMOUNT. 39 pressure gp (= T 2 7’) upon a unit of surface, with which we have now to compare FP. Then gpy = = 9p (= 209", a, gp and ped Men cae METETTTTTTT TTT TTT TTT TT ereee 1). yn gp 0 In order to express the mght-hand side in terms of r, we must assume a law of density and calculate the value of ze . This has been already done (p. 32), and it has been found that gp _a@ sin’ gr— gr sit qr cos gr gp ~ -* sin? qa — ga sin gacos ga Now a ~ oes __ qr sin’ gr — gr sin gr Cos gr = sin’ qr (1 fan =) Let us next divide the earth as Archdeacon Pratt has done? into four shells and a central nucleus, the radius of the nucleus and the thickness of each shell being equal to one-fifth of the earth's radius. The corresponding values of gr and of gr ; tan gr are there given, viz. commencing at the surface, in arc ga = 2'4605 = 140° 58’ 35”, qt = = 19684 = 112° 46’ 52”, q st =1:4763= 84°35’ 9”, g = =0'9842 = 56° 23' 26”, qz=04921= 28° 11' 43”, q@ __a. fan ga ~~ 3085906. 1 Art, 119, 4th ed. GONG oOo SS (CO)