Image: Edinburgh (4513545117)
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Original image (3,968 × 2,976 pixels, file size: 3.48 MB, MIME type: image/jpeg)
Description: An early kind of burglar alarm - trip stairs. The idea was that when a robber broke in, he would try to sneak quietly up the stairs in the dark, not knowing that on the way up there would be steps close together (like the second and third from the top), causing him to hopefully trip and wake someone up. It apparently worked pretty well.
Title: Edinburgh (4513545117)
Credit: Flickr
Author: Lisa from United States of America
Usage Terms: Creative Commons Attribution-Share Alike 2.0
License: CC BY-SA 2.0
License Link: https://creativecommons.org/licenses/by-sa/2.0
Attribution Required?: Yes
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