13 “In a 19th century French experiment by M. M. Biot and Arago a powerful lamp with good reflectors was placed on the summit of Desierto las Palmas in Spain and able to be seen all the way from Camprey on the Island of Iviza. Since the elevation of the two points were identical and the distance between covered nearly 100 miles, if Earth were a ball 25,000 miles in circumference, the light should have been more than 6600 feet, a mile and a quarter, below the line of sight!”
Hurray – a new point at last. Unfortunately… it makes little sense, because the numbers quoted are wrong.
First, a reference for this to a real science publication would help to check on the decidedly dodgy figures claimed.
Mr Dubay does not provide the elevation of the two points. It seems the height of the summit of Desierto de las Palmas is: 729 meters, or 2390 feet at Bartolo peak.
There is nowhere on the island of Ibiza that is particularly close to being 2390 feet high as the highest point on the island, Sa Talaiassa, is 475 meters, or 1558 feet, high. Oops, Mr Dubay has a real problem with facts.
The apparent source for this claim, Zetetic Astronomy Samuel Birley Rowbotham (1816–1884) seems to have messed up the mathematics more than somewhat.
See the following for more details and diagrams: