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- Illustration, Preparing the First Practical Incandescent Lamp for Testing at Edison's Menlo Park Laboratory, October 19, 1879 -

- October 19, 1879
- Collections - Artifact
Illustration, Preparing the First Practical Incandescent Lamp for Testing at Edison's Menlo Park Laboratory, October 19, 1879
- Illustration, Preparing the First Practical Incandescent Lamp for Testing at Edison's Menlo Park Laboratory, October 19, 1879 -

- October 19, 1879
- Collections - Artifact
Illustration, Preparing the First Practical Incandescent Lamp for Testing at Edison's Menlo Park Laboratory, October 19, 1879
- Illustration, Preparing the First Practical Incandescent Lamp for Testing at Edison's Menlo Park Laboratory, October 19, 1879 -

- October 19, 1879
- Collections - Artifact
Illustration, Preparing the First Practical Incandescent Lamp for Testing at Edison's Menlo Park Laboratory, October 19, 1879
- Illustration, Preparing the First Practical Incandescent Lamp for Testing at Edison's Menlo Park Laboratory, October 19, 1879 -

- October 19, 1879
- Collections - Artifact
Illustration, Preparing the First Practical Incandescent Lamp for Testing at Edison's Menlo Park Laboratory, October 19, 1879
- Illustration, "The Edison Laboratory, Menlo Park, NJ, the Eve of 'The Birth of a Great Invention'," October 19, 1879 -

- October 19, 1879
- Collections - Artifact
Illustration, "The Edison Laboratory, Menlo Park, NJ, the Eve of 'The Birth of a Great Invention'," October 19, 1879