When Dan Gelbert takes the time to make a video, you stop what your doing and give it 100% of your attention

Mr. Gelbart - I love your content, your teaching, and your stories. Please do continue to share as much as is enjoyable for you.

“FILL YOUR PIPES and GATHER ROUND” 👍🎩

Thank you very much Mr. Gelbart
00:00 - Automatic Telephone: Almon Strowger, 1888
03:53 - Phonograph: Thomas Edison, 1877
09:33 - Laser: Ted Maiman, 1960
18:54 - Ammonia: Frtiz Haber/Carl Bosch, 1909
31:51 - Transatlantic Cable: Cyrus Field, Oliver Heaviside, 1858
43:50 - Quack Medicine, 1920s & 1930s
48:15 - High Tech Fraud: John Keely, 1872

Why the hell has YouTube waited this long to recommend your channel to me?!, This is exactly the kind of content I enjoy the most!, I'm so happy to have finally found your channel sir, can't wait for more awesome content :)

Being completely honest here - this and another video from the same person are some of the most fascinating things I’ve seen in a really long time.  This is giving me my attention span back.

2020 has been an absolute rollercoaster and seeing the man, the myth, the legend Dan Gelbart bless our YT feed has absolved me of most of my ill will towards this year

His tangent on car radios was so good I forgot that he was supposed to be talking about lasers.

When I grow up I want to be like Dan Gelbart. The man is a treasure.

I love this man. He has a rare ability to explain only the bits one needs to tell his story. I wish he lived next door. My dad was an engineer and any answer to a science question I asked him started with pulling out his ballpoint pen.

The simple elegance of this man's commentary is refreshing.

The phone exchange really blows me away. That would be an impressive invention for a person who worked in a related field, but for a man in a totally unrelated trade to just work his way through it is astounding.

Also, almost spit my drink out laughing at the vibrator bit 😂

The museum of questionable medical devices is one I would wait in line to see 😂

When a billionaire takes the time to make such a video, you better give it 100%

Best episode of antiques roadshow ever!

I just wanted to say, never stop making videos. They are by far the most enligtening videos on youtube. Thank you!

I remember when the Telephone Central Offices were full of "automatic" electro-mechanical switches, (they were called 'Step Switches'). The clatter of hundreds of these switches all operating at the same time was something to behold. It sounded like you were in a tin shed during a hailstorm, but it went on all day. In the modern Electronic Switch Telephone Central Office the whir of the cooling fans is about all you hear. I was in a Telephone Switching Office on Edwards AFB California the day President Reagan was shot in 1981, and the electron-mechanical switches went crazy. It sounded almost like an explosion, and a Sergeant with me said, "Something important has just happened". We exited the building and turned on a portable radio, (the thick reinforced walls of the building made radio reception very difficult), and found the President had been shot and wounded.

A fortunate reason that the first laser was of ruby is that synthetic man made rubies, free of inclusions had already been developed to make  bearings (jewels) used in the watchmaking industry.

The smile and the way his eyes light up when the phonograph starts playing is beautiful. He must have listened to it thousands of times yet his heart still sings when it plays. An incredible man

I wish you had more time to make videos like this. Just so much to learn. I always thought that there was more to the story then what we are being told. Thank you!!