Modern Copper Smelting ... Seventh edition ... enlarged (1895)
PETERS, Edward Dyer. · Scientific Publishing Co. · leaf 606
British Library · HMNTS 07108.h.7. · Digitised by the British Library with Microsoft · No known copyright restrictions (public domain). Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-55-47.webp)
