This map in the pamphlet Spherographia de la Obscuration de la Tierra en el Eclypse de Sol de 22. de Marzo de 1727 has several interesting features. It predates the earliest eclipse map from the United States by 104 years. Curiously, it also seems to predate any known eclipse map from Spain. Of special interest to historians of cartography, this map shows California as an island.

This map has a rough but generally correct delineation of the features of this eclipse. One feature that is puzzling at first is the marking of hours within the penumbral zone. Most eclipses last between 5 and 6 hours, but this map has 12 hours marked. The historian Owen Gingerich explained in a private communication that "...they are the local times when the eclipse is at its at its maximum, and the hour count of the day begins at noon (0h). The observers on the Solomon Islands see the maximum eclipse at dawn (18h) and the shadow races eastward and finally is seen 5 or 6 hours later to be setting (6h) just east of Puerto Rico."

The total solar eclipse of June 24, 1778 was the first to be carefully observed in the newly founded United States. David Rittenhouse, an American astronomer and mathematician, witnessed the eclipse from Philadelphia. Thomas Jefferson, later the third American president, also tried to see this eclipse but was frustrated by clouds in Virginia. He wrote a letter to Rittenhouse remarking on the eclipse and inquiring about a precise clock for astronomical timings.

Two years later during the eclipse of October 27, 1780, an eclipse expedition was sent from Harvard University during the hostilities of the American Revolution. Professor Williams led an expedition to Penobscot Bay in Maine and negotiated safe passage with the British forces occupying that area. Because of what is conjectured to be an error in his tables of the apparent motions of the Sun and Moon, professor Williams narrowly missed totality.