Atomic Shelter (Jan, 1952)

Build a Small Atomic Shelter for your Family & Valuable Possessions

Write now for blueprints
Complete set $7.50
35 West 53rd Street, N.Y. 19, N.Y.

FREE 10 HITLER STAMPS! (Jan, 1952)



Mail coupon at once. We’ll send you this fascinating set of 10 Hitler stamps. Differnt sizes, colors, values. NO COST TO YOU. Stamps were issued by short-lived nation of Bohemia-Moravia. Much sought after. Now becoming SCARCE. Our supply is limited. Don’t ask for more than one set. We’ll also include other interesting offers for your inspection – PLUS a FREE copy of our helpful, informative book, “How to Collect Stamps.” This speccial offer may have to be withdrawn soon – so rush coupon NOW to: Littleton Stamp Co., Dept. PM-1, Littleton. N.H

American citizens are better informed – thanks to Advertising! (Jun, 1958)

This was nestled in among a page of ads in the back of Popular Mechanics. It’s just bizarre; advertisers generically advertising advertising.

American citizens are better informed –
thanks to Advertising!

How to Choose a Geiger Counter (Jan, 1956)

Ah yes, the glorious 1950’s when choosing a Geiger counter was part of every boy’s right of passage. People may not remember their first kiss, but they sure as hell remember their first multi-tube scintillation counter.

How to Choose a Geiger Counter

Rate meter? Multitube counter? Scintillation counter? Here an expert advises you on how to buy a uranium-finding instrument.

By Griff Borgeson

HUNTING uranium with a Geiger counter is like stalking game with a well-trained hound. All of the hundred-odd kinds of uranium ore are radioactive, and hardly any other rocks are. So a counter’s ability to “see” radiation can lead straight to pay dirt.

Counters are the great equalizers of the uranium rush. Thev give a tenderfoot an even break with trained mining men. and account for rank amateurs’ successes in history’s greatest metal hunt.

You can pay from about $20 to $2,000 for a counter, and choose from dozens of models. Which will best suit your needs?

New Bicycle Gearshift & Man with telephoto eyes (May, 1934)

Bicycle Gearshift Makes Hill Climbing Easy for Cyclists

CYCLISTS no longer have to jump off and push their wheels up the steeper hills, now that a bicycle gearshift is available.

The high gear is used for normal riding; the rider has but to shift to low gear, and ride up the steepest of grades in comfort. The coaster brake functions as usual with both gears.

In one type the gear selection is controlled by a lever on the frame; in the other the shifting is done by a foot-controlled lever on the pedal crank.

One-wheel Trailer Folds Up on Car

THE latest in trailers, a one-wheel affair that folds up against the spare tire when not in use, is finding great popularity among English motorists.

A single caster wheel automatically reverses or turns with the car. The luggage rack trailer is hinged to rear bumper at two points.

Eyes Magnify Objects 100 Times

ALVA MASON of Minot, Maine, has eyes which magnify everything within his range of vision one hundred times, making pores appear as deep holes in the skin. He wears demagnifying glasses when at work, since his range of acute vision is limited.

Luncheon Trays for Motorists

A TRAY which tits inside any closed car permits motorists patronizing curb service stands to enjoy food and drink as if they were sitting at a table. The tray can be instantly leveled by turning a thumb screw. No crumbs need get on the upholstery.

New Crystal Radio Is Powerful

THE latest in crystal sets, housed in a beautiful black Bakelite case, has even an illuminated tuning dial. It is claimed that the quality and volume of reception far exceeds that of any ether crystal receiver. No batteries are needed—only aerial, ground, and headphones.

Old And New Communication Methods Combined (Oct, 1939) (Oct, 1939)

Old And New Communication Methods Combined

Old and new methods of communication were combined recently when a Cincinnati radio station used carrier pigeons to speed pictures of a baseball game between Cincinnati Rends and Pittsburgh Pirates to its studio for immediate transmission.


Vote for Pedro!


Voice-Operation Demonstrator Crowns Centuries of Effort by Scientists to Duplicate Human Speech Artificially

HE HASN’T any mouth, lungs, or larynx-but he talks a blue streak. His name is Pedro the Voder, and you may see him in action at the New York and San Francisco world’s fairs. His creation from vacuum tubes and electrical circuits, by Bell Telephone Laboratories engineers, crowns centuries of effort to duplicate the human voice.

To manufacture Pedro’s conversation, his operator employs a keyboard like that of an old-fashioned parlor organ. Thirteen black and white keys, fingered one or more at a time, produce all the vowels and consonants of speech. Another key regulates the loudness of the synthetic voice, which comes from a loudspeaker. A foot pedal varies the inflection meanwhile; so that the same sentence may state a fact or ask a question.

“Yield” Sign Reduces Accidents (Jan, 1952)

After years of research and development, scientists believe they have finally created a new type of street sign. Yes, it is truly a miracle of modern signage; a shining example of American know how and inventiveness.

“Yield” Sign Reduces Accidents

Warning motorists to give the right of way to cars on the intersecting road, a new “Yield” sign is already reducing accidents in Tulsa, Ok la., where it was developed. Designed for use in areas where traffic generally is not heavy enough to warrant full-stop requirements, the sign definitely places responsibility without requiring a complete stop. Motorists approaching the sign must slow down to at least 10 miles an hour and yield the right of way to any car approaching along the intersecting roadway. Any driver becoming involved in a collision at an intersection after passing a yield sign is automatically deemed to have violated the law.

How I Got My Wife to Use a Seat Belt (Jun, 1960)

The title of this article should be: “How Mr. Pavlov got his wife to buckle up: a lesson for the auto-industry.”

How I Got My Wife to Use a Seat Belt

FOR 10 years I have used safety belts in my car. But each time we went for a ride I have had to tell my wife to fasten her belt. She is a most stubborn person and uses all kinds of excuses for not doing so.

I have finally won. These drawings show how. The system tells her to put the belt on. It works like magic every time. It saves arguments. The little reminder consists of a light, the words “Safety Belt,” a buzzer, and two cunningly wired snap switches.

When my wife gets into the front seat beside me, her weight trips a normally open snap switch under the seat. Two things happen: First a doorbell buzzer begins sounding behind the dash, attracting my wife’s attention toward it. Second, in the opening where a clock usually is mounted, the words “Safety Belt” are illuminated by a lamp behind the dash.

The second snap switch, normally closed, is mounted under one strap of the belt so that it is opened by the pressure of pulling the belt across the waist. This breaks the circuit, stopping the buzzer and turning off the lamp. As long as my wife sits in the seat, she’d better have the belt on correctly or the buzzer will let her know. [Editor’s note: An optional cut-out switch is shown in the drawing for those who might like one.]

Now, when we start out, she races me to fasten the belt before I can use the ignition key and turn on the circuit. Seems she doesn’t like to hear the buzz. The only way to stop the buzz is to get out of the seat or turn off the ignition— or put on the belt. If she wants to go for a ride that leaves her little choice.

— Wes Jayne, Woodhaven, N.Y.

Grow Mushrooms for Cash (Mar, 1937)

Men & Women
Earn Cash at Home!

We paid M. M. $267 in 3 weeks for exceptional “cellar crop” patented mushrooms! Big free picture book tells if your cellar, shed, barn suitable. We buy all crops thru ten branches. Write today.
(Estab. 1908)
3848 Licoln Ave., Dept 79 Chicago