Pulvermacher's patent portable hydro-electric chain for personal use : (inventor and patentee- J.L. Pulvermacher) ... / Charles Meinig.
- Meinig, Charles.
- Date:
- 1851
Licence: Public Domain Mark
Credit: Pulvermacher's patent portable hydro-electric chain for personal use : (inventor and patentee- J.L. Pulvermacher) ... / Charles Meinig. Source: Wellcome Collection.