Penny Blood: Serial Sensation and Working-Class Entertainment — page 47: what you’re looking at

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

30 INTERNAL DENSITIES AND PRESSURES. [cu. 1m. earth and of the surface density, it 1s found that ga = 2°4605 = 140° 58’ 35” ; and Qg, or P=10°74, which is therefore the density at the centre of the earth. In order to see to what extent Waltershausen’s formula is incorrect let us apply it to the instance where 8 / 3" a We find that the value of — for this value of r, accord- ing to Laplace’s formula, is | 4+ x 1:°2566: whereas Waltershausen’s formula gives P—p 1 P—p 4&4 Consequently it gives too small a value for this ratio. DENSITIES ACCORDING TO WALTERSHAUSEN. RADIUS. | DENSITY. 1-00 2°66 0°99 2°79 0-98 2°93 0°97 3°07 | Lime, 0°96 3°20 | Magnesia. Iodine, Iron oxide. Tellurium, Chromium. 0°95 8°34 0:94 3°47 0°93 60 0°92 "72 0°91 "85 0-90 -99 Alumina. "15 29 © fr) oO CO DD © & BW ~JI AT Sd Or GS GD G OS ‘60 ‘09 Zine, Iron, Tin. 0°50 85 Cobalt, Steel. 0°40 “47 Uranium, Nickel, 0-30 ‘96 | Copper. 0°20 31 0°10 51 0-00 *59 | Bismuth, Silver. 1 Pratt’s ‘‘ Figure of the Earth,” 4th ed. Art, 115. COMiCOOOkKXxS. Conn @