Penny Blood: Serial Sensation and Working-Class Entertainment — page 178: what you’re looking at

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

CH, x11.] THE THERMOMETER. 161 , ~_,=1, o=y =1057, h=9815, r—7 o r-—fT The thickness of the crust at the place A then comes out, c = 96623 feet = 183 miles, And for the melting temperature, a=er+b = 1944° FB. We also find for the thickness of the crust at the mountain, , a-b c= — = 1913 x 102 feet = 36°9 miles, If however we assume 7, degree F. per foot as the rate of increment of temperature at the place on the sea-level, instead of »1, we then obtain for the thickness of the crust there, c = 138032 feet . == 26°1 miles. And for the melting temperature | a = 2350° F. And for the thickness of the crust at the mountain c = 235734 feet = 44°6 miles. The observations which were made upon the temperature of the rocks in the Mont Cenis’ tunnel, appear to have been less systematic than in the tunnel through Mont S. Gothard. The highest temperature recorded was 85° F. at a distance of 21000 feet from the southern opening, while the whole length of the tunnel was 40094 feet; so that that temperature oc- curred at about the middle of the tunnel, At that point the elevation of the tunnel above the sea was about 4391 feet, and 1 “Nature,” Vol. rv. p. 86, p. 415, and p. 434. GONG oOo SS (CO)