Volcanoes were quite numerous in the world's early days, but they're going extinct one by one; the heat inside the earth is growing weaker, the temperature in the globe's lower strata is cooling appreciably every century, and to our globe's detriment, because its heat is its life."
De vulkanen, die in vroeger tijdperken zoo talrijk waren, dooven langzamerhand uit; de inwendige warmte verflauwt, de temperatuur der onderste aardlagen daalt eeuw op eeuw vrij merkbaar, en dit ten nadeele van onze aarde, want die warmte is haar leven."