Note 11 — THE VELOCITY OF LIGHT.

According to Mr. Jules Andrieu, the idea that nature must be tortured to reveal her secrets is preserved in the name crucible—from the Latin crux, a cross. But, more probably, crucible is derived from some Old French or Teutonic form, as cruche, kroes, krus, etc., a pot or jug (cf. Modern English crock, cruse, and German Krug).—Trans.