Inventions & Breakthroughs of February 1931
Gadgets, lab surprises, odd bets, and future-shocks from this slice of the calendar.
1 
Electron Diffraction Camera
2 
Air Traffic Control System
3 
Pressure Cooker Modern Design
4 
Concrete Vibrator
5 
Electric Razor
6 
Automatic Elevator Controls
7 
Optical Sound-on-Film System
8 
Polyvinyl Chloride Commercialization
9 
Aircraft De-Icing System
10 
Early Radar Experiments
The Sounds of
Popular recordings and roots/country selections associated with the year
HEADLINES ON February 21, 1931
Full News Archive
- Headline: Slur on Senators Is Deleted By House. Impact: This headline is a small primary-source snapshot of February 21, 1931, showing what editors and readers were tracking that day.. Fact: This card is grounded in the archived headline and index note shown on the page; no extra unsourced anecdote has been added..
- Headline: Detroit'S School System. Impact: This headline is a small primary-source snapshot of February 21, 1931, showing what editors and readers were tracking that day.. Fact: This card is grounded in the archived headline and index note shown on the page; no extra unsourced anecdote has been added..
- Headline: Lea Denies Charge of 'Kiting' Checks. Impact: This headline is a small primary-source snapshot of February 21, 1931, showing what editors and readers were tracking that day.. Fact: This card is grounded in the archived headline and index note shown on the page; no extra unsourced anecdote has been added..
- Headline: Finds Rise in Attacks on Civil Liberties. Impact: This headline is a small primary-source snapshot of February 21, 1931, showing what editors and readers were tracking that day.. Fact: This card is grounded in the archived headline and index note shown on the page; no extra unsourced anecdote has been added..
- Headline: Full List of Holding Companies Controlled By Railroads Jointly. Impact: This headline is a small primary-source snapshot of February 21, 1931, showing what editors and readers were tracking that day.. Fact: This card is grounded in the archived headline and index note shown on the page; no extra unsourced anecdote has been added..
- Headline: Miss Van Wie Loses to Miss Hicks on 19th Hole in Florida Title Golf Final. Impact: This headline is a small primary-source snapshot of February 21, 1931, showing what editors and readers were tracking that day.. Fact: This card is grounded in the archived headline and index note shown on the page; no extra unsourced anecdote has been added..
- Headline: Labor Chief Faces Income-Tax Trial. Impact: This headline is a small primary-source snapshot of February 21, 1931, showing what editors and readers were tracking that day.. Fact: This card is grounded in the archived headline and index note shown on the page; no extra unsourced anecdote has been added..
- Headline: Urges Broader View Toward Social Work. Impact: This headline is a small primary-source snapshot of February 21, 1931, showing what editors and readers were tracking that day.. Fact: This card is grounded in the archived headline and index note shown on the page; no extra unsourced anecdote has been added..
- Headline: Topics of Interest to the Church Goer. Impact: This headline is a small primary-source snapshot of February 21, 1931, showing what editors and readers were tracking that day.. Fact: This card is grounded in the archived headline and index note shown on the page; no extra unsourced anecdote has been added..
Wall Street Time Machine
The Right Call: If you'd invested $1,000 in any one of these companies in 1931, here's what the stored 2025 dataset estimates.
Rank #1
PG
Procter & Gamble
Price in 1931
$0.25
2025 dataset value
$586,657
Procter & Gamble - If you invested $1,000 in 1931, it would be worth $586,657 today (586.7x return)
Rank #2
CVX
Chevron
Price in 1931
$0.31
2025 dataset value
$474,914
Chevron - If you invested $1,000 in 1931, it would be worth $474,914 today (474.9x return)
Rank #3
GE
General Electric
Price in 1931
$0.62
2025 dataset value
$487,500
General Electric - If you invested $1,000 in 1931, it would be worth $487,500 today (487.5x return)
🧸 Top 5 Toys
Tinker Toys
$150.00
Yo-Yo
$40.00
Model Train Sets
$1,500.00
Ernst Plank Tin Toys
$2,895.00
Wooden Building Blocks
$150.00
⚾ Notable Trading Cards
1931 W517 Babe Ruth
$5,000+ (condition dependent)