We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. a food, an astronomy word, a verb (action word), something from the sea. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. This gave rise to the Old French zede, which resulted in the English zed. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.ДЄs a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. This work is in the public domain in the United States of America, and possibly other nations. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work was reproduced from the original artifact, and remains as true to the original work as possible.

Like, in ancient Egypt, Ptolemy measured the circumference of the Earth by measuring the lengths of shadows at different latitudes.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. Of course there are other ways to demonstrate that the Earth is round. That's why in general, one experiment is not sufficient to prove or disprove a theory. Yes, as others have noted, refraction and optical illusions add extra complexity. You could resolve that by observing what you CAN see: at long distances, where you can barely see the far shore, do you just see the top of mountains or tall buildings? Or do you see the whole mountain or building but very hazy? (Okay, I haven't done that experiment, so maybe I'm just a dupe of the round-Earth conspiracy.) One could argue that you can't see the far shore because of haze rather than curvature. Flat Earth CluesThe Atlantean Conspiracy (Final Edition)When the. Get the most powerful telescope available and you still can't see the opposite shore. Zetetic Astronomy Earth Not A Globe An Experimental Inquiry Into The True Figure Of The. Look across a sufficiently large sea today and, no matter how clear the skies, etc, you cannot see the opposite shore.

It was observed in the days of sailing ships that as a 'tall ship' sailed away, the last thing you would see was the top of its sails. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the.

In fact, making observations across an ocean or large sea is one of the easiest proofs that the world is round. To say, 'I can imagine an experiment which would prove my theory correct' is a long way from 'I have conducted this experiment and the results actually did prove my theory correct.' But as far as the quoted page goes, he doesn't cite any experimental results to prove anything, one way or the other. Zounds, good point! I guess the world is flat after all!Д«ut okay, seriously, the writer has given a good and accurate argument why it should be possible to tell whether the world is round or flat by making observations on the ocean or a sufficiently large sea. An experimental inquiry into the true figure of the earth, proving it a plane, without orbital or axial motion, and the. This gives rise to the water mirages you can see on hot days on roads or sand (where there is a very strong temperature gradient with height). In the situation where it is warm near the surface and cools aloft you get the opposite and light bends up toward the sky. This means whatever you are observing is actually lower than you perceive it. a temperature inversion), which is likely above a cool body of water like a canal (or in winter, or at night and early morning), the resulting density gradient causes light to bend toward the ground.

When cool air is at the surface and warms with height (e.g. At low angles above the horizon the temperature structure of the atmosphere becomes very important in determining optical refraction and at low angles very close to the ground it becomes extremely important. Density varies in the atmosphere enough that the refractive index varies. The biggest flaw I see in a cursory look at this work is failure to compensate for atmospheric refraction.

Zetetic astronomy original copy