Comparison of solar eclipses. Historical map comparing the path of the shadows caused by two separate solar eclipses. The band running from middle left to bottom right shows the eclipse of 1715. The band running from top right to bottom left shows that of 1724. The dark oval gives the size of the moon's shadow at a given time during the eclipse. This diagram is based on the calculations and observations of Edmond Halley (1656-1742). Publications like this (broadsides) were intended to make astronomical events accessible to everyday people, and to publicise the work of the scientists and publishers involved. For separate maps of these two eclipses see images V700/0493 and V700/0502.
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