| The high degree of calcination of the bone ashes in both kitchens and the heat-altered hearth slabs give evidence of high temperatures, implying a good supply of oxygen. |
| Indians were masters of calcination, distillation, sublimation and preparation of metallic salts, compounds and alloys. |
| Oxidative calcination is commonly used to convert metal sulfide ores to oxides in the first step of recovering such metals as zinc, lead, and copper. |
| They had been collected for the purpose of undergoing the process of calcination. |
| The calcination is effected in reverberatory furnaces, or in muffle furnaces, if the sulphur is to be recovered. |
| For example, the calcination of metals in sealed containers demonstrated that no change in mass occurred. |
