Electro-ballistic apparatus for measuring the speed of cannon-balls – Antique Print
(Originally scanned by the Library of Congress. Each image is professionally and digitally cleaned of artifacts such as color bars and extra borders prior to printing.)
Description
Electro-ballistic apparatus for measuring the speed of cannon-balls comes to life in this antique engraving, reproduced from the original with every detail intact. Sourced directly from the Library of Congress, it represents an authentic piece of documented history.
The framed print arrives ready to hang; the unframed option suits custom framing. A fine choice for anyone who loves history, and a gift that gets noticed. Free shipping in the lower 48 states. Snapshots of the Past, founded in 2001, has served tens of thousands of customers worldwide.
Electro-ballistic apparatus for measuring the speed of cannon-balls
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This engraving shows an electro-ballistic apparatus built to measure how fast a cannonball travels, a problem that mattered to artillery makers and gunnery officers during the Civil War. Devices of this kind used electrical circuits that were broken as a projectile passed screens or wires set at known distances, letting an electrical timer record the interval in fractions of a second. *Harper's Weekly*, a popular illustrated newspaper, ran engravings like this one to explain new technology to readers who followed the war closely. The print is a wood engraving, a method that let printers reproduce drawings alongside news text.
| Created / published | 1864 |
|---|---|
| Medium | 1 print : wood engraving. |
| Notes | Illus. in: Harper's Weekly, (1864). This record contains unverified, old data from caption card. Caption card tracings: Shelf. |
| Source | Library of Congress, Prints and Photographs Division |
| Original scan | 1,536 × 1,423 px · prints to 5 × 5 in at 300 dpi |
| Reference | AMZ-SOTP-HPA-123689 |
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