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A Guide to the Mineral Gallery ... With an Introduction to the study of Minerals. [By L. Fletcher

FLETCHER, Lazarus - Sir, Director of the British Museum (Nat. Hist.) · 1884 · 11 pictures

A museum handbook to the British Museum's mineral gallery, written by mineralogist Lazarus Fletcher in 1884 for London visitors learning to read crystals and specimens. The plates mix engraved crystal diagrams with dotted hidden edges and lettered angles, gridded cubes showing stacked unit cells, and dense concentric coils of magnetic and optical apparatus useful as line-based geometric ornament.

British Library · HMNTS 7104.b.6. · Digitised by the British Library with Microsoft · No known copyright restrictions (public domain)