[2931] “Abacus.”
[2932] In the preceding [Chapter].
[2933] Meaning that they are semitransparent, Ajasson thinks. One great characteristic of Fluor spar is its being subtranslucent.
[2934] This would appear to be the meaning here of “sales.” See p. [396].
[2935] One of the grounds, Ajasson says, on which may be based the opinion that they were artificial.
[2936] Colourless crystals, quartz, or rock crystal; called “white stone” in jewellery.
[2937] See B. xxxvi. c. [45]. This was a very general opinion of the ancients with respect to crystal.
[2938] Κρύσταλλος, from κρύος, “cold.”
[2939] See B. v. c. 29.
[2940] In Caria, see B. v. c. 29.