cupel
71Tete-a-tete — T[^e]te [ a] t[^e]te (t[=a]t [.a]*t[=a]t ), n. [F., head to head. See {Tester} a covering, {Test} a cupel.] 1. Private conversation; familiar interview or conference of two persons. [1913 Webster] 2. A short sofa intended to accomodate two… …
72To hold by the button — Button But ton, n. [OE. boton, botoun, F. bouton button, bud, prop. something pushing out, fr. bouter to push. See {Butt} an end.] 1. A knob; a small ball; a small, roundish mass. [1913 Webster] 2. A catch, of various forms and materials, used to …
73cupellation — noun Date: circa 1691 refinement (as of gold or silver) in a cupel by exposure to high temperature in a blast of air by which the unwanted metals are oxidized …
74test — I. noun Etymology: Middle English, vessel in which metals were assayed, potsherd, from Anglo French test, tees pot, Latin testum earthen vessel; akin to Latin testa earthen pot, shell Date: 14th century 1. a. chiefly British cupel b. (1) a… …
75cupeller — noun see cupel II …
76Magnesite — General Category Carbonate mineral Chemical formula MgCO3 …
77Coat of arms of Birmingham — The coat of arms incorporated into a keystone over an entrance to the former City of Birmingham fire station at Harborne. The coat of arms of Birmingham is the heraldic emblem of the English city of Birmingham. It was first used in 1838 and has… …
78Bone ash — is the white, powdery ash left from the burning (calcination) of bones. It is primarily composed of calcium phosphate. It is commonly used in fertilizers, polishing compounds, and in making ceramics (such as bone china). It also has historical… …
79Refining (metallurgy) — Refining (as in non metallurgical uses) consists of purifying an impure material, in this case a metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material …
80Liquation — is a metallurgical process for separting metals. It was particularly used for extracting silver from copper. The copper is heated in a furnace or cupel with a larger quantiry of lead. This leads to the silver migrating into the lead. The metal is …
