The British Encyclopedia: Or, Dictionary of Arts and Sciences. Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge, Τόμος 1Longman, Hurst, Rees, and Orme, 1809 |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 4 από τα 4.
Σελίδα
... cupel , where it sinks ; the fume consists of lead in vapour , and the red stream of vitrified lead which carries down with it the copper , or other alloy of silver into the cupel . As the cupellation advances the melted button becomes ...
... cupel , where it sinks ; the fume consists of lead in vapour , and the red stream of vitrified lead which carries down with it the copper , or other alloy of silver into the cupel . As the cupellation advances the melted button becomes ...
Σελίδα
... cupel , but lies on the surface as a red scoria . The heat is known to be too great when the cupel can scarcely be distinguished from the muffle , and the as- cending fame can scarcely be seen for the dazzling heat . Towards the end of ...
... cupel , but lies on the surface as a red scoria . The heat is known to be too great when the cupel can scarcely be distinguished from the muffle , and the as- cending fame can scarcely be seen for the dazzling heat . Towards the end of ...
Σελίδα
... cupel the mixture first with lead ; and likewise even when no copper is com- bined with the gold . The cupellation of gold is thus conduct- ed ; the portion of the alloy of silver being estimated by touch - needles , as much sil- ver is ...
... cupel the mixture first with lead ; and likewise even when no copper is com- bined with the gold . The cupellation of gold is thus conduct- ed ; the portion of the alloy of silver being estimated by touch - needles , as much sil- ver is ...
Σελίδα
... cupel so striking , that fraud can hardly escape an experienced eye . Parting might be used even when the platina was more than a tenth of the gold , but then more silver must be added , which would render the cornet so very thin after ...
... cupel so striking , that fraud can hardly escape an experienced eye . Parting might be used even when the platina was more than a tenth of the gold , but then more silver must be added , which would render the cornet so very thin after ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
acid alumina ammonia anatomy ancient angle animal aphides appear arch architrave artery astronomy bees benzoic acid bill bird-lime birds blood body bones botany branches called calyx cartilage cavity chyle class and order class of plants colour columns common consists contained cornice corolla covered cupel cymatium diameter distance divided earth entablature equal equation feet figure flowers fluid four genus head heat height hive inches insects Ionic order kind land leaves length less manner membrane ment mercury Monogynia class moon motion multiplied muscles native natural nerves nitric acid oblong observed orbit papillæ pass person petals pilasters potash produce proportion quantity right ascension Roman root round roundish seeds shew side soil sometimes species specific gravity square stars substance surface tained term tion tree tube upper vegetable vessels whole