- 1870 – 1900
Illustration depicting an electric stamp, a device used to deface stamps with a heated platinum wire in the form of a design or initial. The device is powered by electricity, using the hand of its user to complete the…
- 1870 – 1900
Black and white illustration depicting the electric pen, an invention of Thomas Edison (1847-1931). Powered by an electric motor, the pen was created as a means to duplicate documents. It operates by using a perforating…
- Part of A Memorial of Joseph Henry
Frontispiece half-bust portrait engraving of Professor Joseph Henry.
A memorial written for Joseph Henry, who served as secretary for the National Institute for the Promotion of Science, the precursor of the…
- Author United States. Congress, Smithsonian Institution
- Engraver United States. Bureau of Engraving and Printing
- Printer United States. Bureau of Engraving and Printing
- Subject Electromagnetism, Henry, Joseph, 1797-1878, Self-inductance, Smithsonian Institution, National Institute for the Promotion of Science
A memorial written for Joseph Henry, who served as secretary for the National Institute for the Promotion of Science, the precursor of the Smithsonian Institution, and then became the first Secretary of the Smithsonian…
- Part of Encyclopædia of Chemistry, Theoretical, Practical, and Analytical, as Applied to the Arts and Manufacturers, Vol. I
Two examples of Gramme's machines for electro-metallurgy.
"This machine differs from all other magneto-electric machines at present known, inasmuch as it is the only one that gives a continuous current in one…