Attribution 4.0 International (CC BY 4.0)
You can use this work for any purpose, including commercial uses, without restriction under copyright law. You should also provide attribution to the original work, source and licence. Read more about this licence.
Credit
M0014734: Electrical apparatus of Thomas Blunt, late 18th to early 19th century. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.