Almanac: The first burglar alarm

On this day 158 years ago Edwin Holmes of Boston installed the very first electric burglar alarm. Charles Osgood reports.

[@Josh-le6lu]

Amazing to see the very first electric brhghrlargh

[@nqthyy1805]

How come no one has said anything?

[@danielvillalvazojaramillo9778]

Awesome

[@jen626ful]

Sounds like a France railroad crossing

[@RETIREDAMATUER]

I have one installed in my house