The faces are often etched or corroded.
Her cheeks burned anew as she recalled what would hereafter be etched in her mind as the kiss.
Percussionfigures, readily made on the cleavage-faces, have rays parallel to faces of the rhombic dodecahedron; whilst figures etched with water represent the four-faced cube.
A similar distribution of electric charges is produced when a crystal is subjected to pressure; quartz being thus also piezo-electric. Etched figures, both natural and artificial (in the latter case produced by the action of hydrofluoric acid), on the faces of the crystals are in accordance with the symmetry, and may serve to distinguish leftand righthanded crystals.
The latter are in fact little microscopes carrying a vernier etched on glass, in lieu of a filar micrometer.
If before this application of the molten glass the metallic leaf, whilst resting on the thin film of blown glass, was etched with a sharp point, patterns, emblems, inscriptions and pictures could be embedded and rendered permanent by the double coating of glass.
Courtois etched with skill twelve battle-subjects of his own composition.
They are the broken bases of drinking vessels containing inscriptions, emblems, domestic scenes and portraits etched in gold leaf.
Instead of drawing these squares upon the map itself, they may be engraved or etched upon glass, or drawn upon transparent celluloid or tracing-paper.
The warrior painted the story of conflicts on his robe only in part, to help him recount the history of his life; the Eskimo etched the prompters of his legend on ivory; the Tlinkit carved them on his totem post; the women fixed them in pottery, basketry, or blankets.
The ridges and intervening valleys, long parts of which have an approximately parallel trend from south-west to north-east, were formed by the erosion of folded sediments of varying hardness, the weak belts of rock being etched out to form valleys and the hard belts remaining as mountain ridges.