According to Kiernan, Humfrey's furnace was far more efficient than the traditional bole, and its eventual widespread adoption enabled rapid expansion of the mining industry after 1570, and the export from England of large quantities of lead.
Humfrey's furnace was far more efficient than the traditional bole. This was according to Kiernan. Its eventual widespread adoption enabled rapid expansion of the mining industry after 1570. This was according to Kiernan. Its eventual widespread adoption enabled the export from England of large quantities of lead. This was according to Kiernan.