74.3 MB (6.9 MB compressed)
5067 x 5123 pixels
42.9 x 43.4 cm ⏐ 16.9 x 17.1 in (300dpi)
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Rene-Just Hauy. Illustration of Rene Just Hauy (1743-1822), French mineralogist and the founder of crystallography. Hauy successfully trained as a priest but grew interested in crystallography in 1781. He had noticed that the fragments of a broken calcite crystal clove along straight lines that met at constant angles. In 1784 he showed that crystals were built up of tiny units; the shape of the crystal being determined by the shape of the units. Hauy helped Lavoisier to determine the density of water. In 1802 Hauy became a professor of mineralogy at the Museum of Natural History in Paris and wrote a crystallography book at Napoleon Bonaparte's specific request.
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