Various shots inside zinc preparation plant showing zinc blend being fed into hoppers, vats containing thick liquid kept in movement by large agitators, furnace opening where sphalerite is roasted to obtain metal. Various shots of machinery, vats, processes necessary to preparation of zinc. Shot of testing of zinc in laboratory. Shot of what is probably preparation of zinc by electrolysis. Plates of metal are formed in large electrolytic bath, taken out, carted to furnace and dumped in, presumbably, in order to obtain zinc in ingot form.