Since Tom and others insist on REers reading it, I am currently reading Earth Not A Globe via the "Library"
link.
I must say, I am quite intrigued with the whole thing, given it was written in the 19th century.
I am sure I will have a few questions that arise from reading it, but one popped up for me on page labeled 53.
Rowbotham proposes that one could veritably prove a uni-polar flat earth map by measuring one degree longitude along the 45th parallel south. He goes on to assume that the result would be 20 miles longer than that of one degree longitude along the 45th parallel north. Has anyone done this "experiment" to prove/disprove this notion? I'm sure given the technology we have, it has easily been done, but given that all "modern" longitude measurements are done using global coordinates, this experiment would need to be performed "old school" to satisfy all parties. (Though, honestly, I haven't done any thorough research to find out.)
More to come...