Serpentine

Definition and stakes

Portrait of Catherine Cooper Hopley Catherine Cooper Hopley,  Snakes: Curiosities and Wonders of Serpent Life

“ Having respect for the opinion of so thoughtful a writer, and further encouraged by the fact that some of our most eminent physiologists have not thought it beneath them to give their attention to the various serpentine appearances which from time to time are seen at sea, and that the majority of them believe in the possibility of an unknown marine reptile, let us accept this idea as the basis of an endeavour to lay before my readers another summing up of evidence gathered from the still more recent writings on ‘The Great Sea Serpent’ of modern times. ”
Source: Gutenberg

Giorgio Vasari,  Vasari on technique (1907)

“ On the subject of serpentine some misapprehension exists. Mineralogists apply the term to a soft stone of a green hue with long curling markings through it, which in their form suggest lacertine creatures and account for the name of the stone. It derives its colour from the presence of a large percentage of manganese in union with silica, and contains twelve or so per cent. of water. A penknife scores it easily. The ‘Verde di Prato,’ a dark stone used in bands on Tuscan buildings, of which there is question in a subsequent section, postea, p. 43, is a species of true serpentine. ”
Source: Gutenberg

William Bingley,  Useful Knowledge: Volume 1. Minerals

“ In many countries they constitute considerable hills. They abound in ores.
260. SERPENTINE is a primitive rock, usually consisting of quartz (76) , magnesia (198) , alumine (197) , with a portion of oxide (21) of iron.
229This rock and its various uses, have been already described (132) . It generally occurs in shapeless masses and beds; and seldom in distinct strata. It is found in Cornwall, the island of Anglesea, and several parts of Scotland; but it rarely forms mountains.
Ores of lead, silver, and copper, are sometimes found in serpentine.
”
Source: Gutenberg

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