76) “From Genoa, Italy 70 feet above sea-level, the island of Capraia 102 miles away can often be seen as well. If Earth were a ball 25,000 miles in circumference, Capraia should always remain hidden behind 5,605 feet, over a mile of supposed curvature.”
Very phony numbers
Monte Castello on Capraia has an elevation of 447m. With 300m observation height in Genoa and and refraction coefficient of 0.2 at a distance of 164km you get 170.9 km of added intersecting sight lines. Capraia is visible.