A GENERAL METHOD OF CALCULATING THE ANGLES MADE BY ANY PLANES OF CRYSTALS, AND THE LAWS ACCORDING TO WHICH THEY ARE FORMED.

London Royal Society 1825 A Very Good+ extract in modern red wrappers with white title label front cover from Phil. Trans. Vol. 115, 1825, pp. 87-130 with foxing, stain lower corner of engraved plates affecting small portion of images. Sm. 4to. Includes 3 engraved plates. Very Good+ Of greater importance was Whewell's work in mineralogy. In a paper read before the Royal Society in 1824, Whewell, according to Herbert Deas, "Laid the foundations of mathematical crystallography." His system for calculating the angles of planes of crystals assumed that crystals are aggregates of small rhomboids that can be thought to shrink below the level of possible measurement, thus suggesting that crystals are latticelike. (DSB Vol. 4 p. 293).