The assays were made in the cupellation or assay furnace, which needs to have windows and bellows to ascertain that the air oxidises the lead, as well as to be sure and prepared to take away the cupel when the process is over.
22.
:: It ones hepend to me with the artical " Gelfand pair " but I fixed it using the metod abuve, I think I mentioned this in the help-desk it was cupel of month ago talk ) 08 : 52, 14 October 2008 ( UTC)
