In the 1950s, how is a message sent from a speeding train via "loop"?

Post date: 2022-11-28 11:07:21
Views: 248
In the 1952 movie The Narrow Margin, the police officer hero sends a message from a speeding train, apparently by writing it on a piece of paper for a railway employee next to the track to physically swoop it down. What is this device/interaction/method of communication ?

This all happened very quickly, so it was hard for me to understand what was happening or know what I was looking at. This link briefly describes the shot: https://classicmovierev.com/the-narrow-margin-1952/

" At the next town, a railroad employee snags a loop off the speeding train with his arm and has Brown's message for the Highway Patrol."
Please click Here to read the full story.
 
Other Top and Latest Questions:
Bitcoin's high-conviction holders are turning into sellers as the crypto's price hits new lows
Trump's 'big beautiful bill' has a 'double taxation' trap for top earners, tax lawyers say
India's viral 'Cockroach' party has millions of followers. What investors need to know
Is Gmail really not allowing other clients?
Top Chef: Plate Expectations
Book: The Book of Why: The New Science of Cause and Effect (2018)
Game Changer: Rulette 2
Book: The Serviceberry: Abundance and Reciprocity in the Natural World
Blackstone restricts flagship fund withdrawals as private asset fears reemerge
Jim Cramer's top 10 things to watch in the stock market Thursday