Heine, discovery of crystals of feldspar in scoriae, 268.
Hemmer, falling stars, 119.
Hencke, planets discovered by. See note by Translator, 90, 91.
Henfrey, A., extract from his Outlines of Structural and Physiological
Botany. See notes by Translator, 341, 342, 351.
p 368 Hensius on the variations of form in the comet of 1744, 102.
Herodotus, described Scythia as free from earthquakes, 204; Scythian saga of the sacred gold, which fell burning from heaven, 115.
Herschel, Sir William, map of the world, 66; inscription on his monument at Upton, 87; satellites of Saturn, 96; diameters of comets, 101; on the comet of 1811, 103; star guagings, 150; starless space, 150, 152; time required for light to pass to the earth from the remotest luminous vapor, 154.
Herschel, Sir John, letter on Magellanic clouds, 85; satellites of Saturn, 98; diameter of nebulous stars, 141; stellar Milky Way, 150, 151; light of isolated starry clusters, 151; observed at the Cape, the star pi in Argo increase in splendor, 153; invariability of the magnetic declination in the West Indes, 181.
Hesiod, dimensions of the universe, 154.
Hevellus on the comet of 1618, 106.