The density of liquid metal still amazes me. "We're going to put a POUND of mercury in here" *Adds a tablespoon of it*

Getting shocked from Non Electrical Vacuum Pump Good Old Cody :D

"I gotta little diamond here to cut the tubing" *pulls out spare pocket diamond*

“I don’t think one of these has been made since color photography was invented.” You now have my full, undivided attention sir.

The entire premise of this channel is Cody saying " ehh, it should be okay"

I really enjoyed watching the glasswork, I had some glassblowing lessons a couple of years ago and you make it look so much easier. Also you didn't burn your fingers or injure yourself on glass shards. Great job.

This was a great video. Really cool to see some historical machines on this channel. Hope to see more like this in the future.

"I'm 80% sure it won't break" Science in action, folks.

SAFETY SQUINTS!

Thanks so much for the shoutout! I had never heard of a Sprengel pump -- very interesting -- and very insightful comparison to an aspirator pump. Your video output and motivation is incredible, man! Your discovery of the electrostatic charge pumping must have been exciting -- similar to a Kelvin water dropper.

Codys getting shocked by a non eletric pump reminds me Homer Simpson making a salad and it caches fire.

The intelligence of the people who were able to come up with this stuff really blows my mind. I was aware of geniuses from the past, but to see their inventions being put into practical use like this with seemingly basic supplies is amazing to me.

I would love to see you do more videos on 18th century machines for scientific investigation.

I thought you were going to say "Never stick one finger in each end or you might get sucked through!" :P

In this episode Cody makes a mercury powered vacuum pump inside a chicken coop.

As a glassblower, I cringed really hard in the beginning. That being said, I was very impressed with what you managed to put together and that the cold seals on the welds actually held up in a vacuum! MISSION PASSED - RESPECT +

~Looks up pump on wikipedia~ "Got some idea how it works" ~Builds pump~ Say what you will, but that is bad ass.

Alternate title: "man sticks fingers into mercury. the results are shocking!"

"Never stick your fingers in the two reservoirs of mercury" :D. Cool video! It's ever again great to see what our forefathers reached with such a simple technology. We way often forget, what is actually possyble with the simple things.

He said “safety squints!’ Love to see “best, smartest, most straightforward, and smartest, and self-effacing tube-sters find and appreciate each other.

You are one of the only good channels left on KZfaq.

A twenty minutes DIY Cody's video? **Makes Coffee** EDIT: **after watching** AWESOME! ^_^

This would work more like you wanted if the radiometer was the other way up, so the remaining air/vapour in the chamber flows out under gravity. I used to work for a company making mercury barometers, and worked with diffusion pumps, and this is part of how they work.

This is my favourite video on KZfaq. It just has everything! Vacuum, history, self made, glass working with stretching of tubes to needles with careless precision, discovering and experiencing the sound of a mercury pump which few people ever can, better efficiency than modern version, light able to physically move things, knowledgeable guy, lasers, fun, deductive reasoning, figuring things out by yourself, experience the world up close, gas permeating plastic tubing, electrostatic light flashes, realistic security considerations, a satisfying ending with success, danger and educational. It's so inspirational! So many valuable life lessons packed into twenty minutes!

"Today we cool some mercury to 0K and open a wormhole to a parralell universe" Later... "I'm putting my finger in it"

cool! Could you measure the voltage between both reservoirs? also: Would shorting both with a wire affect the pump itself in any way?

I love how you can use this pump to both evacuate and run a lightbulb, just by moving some mercury around.

Anybody about anything: This has not been done in centuries and we have no records to work from. Cody: I think I can figure it out....

I'm very glad you made this pump. It's one of the classical masterpieces of scientific laboratory inventions that's similar to a typical water aspirator but relies on the high density of mercury. One thing I have to warn you about (and I keep warning in in every video where you work with glass) - anneal your glass! Download a book on flameworking and see the details; they can make a difference between successful apparatus and an explosion/implosion. The joints you've made are extremely unstable and prone to cracking. I was very surprised this thing actually survived. You're working with glass as if it's metal. It can't be suddenly attacked by vicious sharp hot flame and then quickly left alone without storing enormous stresses inside and I'm positively certain that one day such practice will make you pay. Please be more careful. BTW, the charge separation is very common in vacuum systems. This one is similar to Kelvin water dropper. One initial difference will build up. Also, Sprengel is pronounced ['ʃprɛ. ŋəl ] as it's a German surname. G is hard and S is sh.

that simple 200y old diy thingy beats some modern pumps

Tfw Cody almost killed himself in a way no one would've guessed.

This is still my favorite video, Cody. Your other ones are interesting but while I am a computer and electrical engineer, this pump is absolutely amazing.

Please measure the voltage between the two reservoirs!

The mercury had effectively been doing the old "rub the glass rod" static electricity experiment for tens of hours. Ouch!

THIS is what a science channel on youtube should be like

This pump is one of the most fantastic ideas I have ever seen demonstrated on youtube. It is so simple and yet works so efficiently. I would love to see a professionally implemented instance of this pump produced and working. Thanks for showing us how this basic mechanical pump can be so wonderful.

Wow, you're really pumping out the videos. My Robinair is rated 30 microns, and I thought that was a deep vacuum at 99.995% of full vacuum.

really cool thing to note, you might be one of very few people to have a mercury vapor based radiometer.... which is kinda cool in a way.

I love how KZfaq recommends this one video of yours about every six months. It's an amazingly simple contraption, with very complicated things going on at the same time.

Your videos have always been a source of continuous inspiration and awe for chemistry. I'm truly amazed that you were able to do so many amazing things with this particular subject.

He said Safety Squints, AvE's Jargon had rubbed off on my vernacular too.

Thanks for making me feel smarter and dumber at the same time. Appreciate it 👍lol

I LOVE this!! Always enjoy walking along with you in your videos! Thank you for taking the time to share your knowledge and experiences!!

Hello Cody, I've seen etchings of this mercury pump before, but I've never seen one actually working.I like your enthusiasm. Thank you. Chris

I missed seeing this one somehow when it was posted, this might be my favorite project of yours recently. Can the drip tube be made a larger diameter so you can pull vacuum faster for your larger chamber?

"For those of you worried about mercury vapor; It's OK because i have that window open." -Cody

The idea of using syphoning with water as a way of producing work has always fascinated me. To see you do so with mercury is just so cool! Watching your ideas come to life gives me many ideas, so thanks for that! Cheers

This is possibly the best thing I've ever seen you do, kudos.

My sugestions for future videos: 1) extract iron from blood 2) extract iron from spinach 3)extract platinum from lightning rod 4) extract liquid methane from farts 5) extract iron from cereals 6) extract minerals from tears

How does someone get to the question "I wonder what would happen if I put one finger in this here pool of mercury and another in this here other pool of mercury"

This is one of my favourite videos you've done - what a great mechanism.

Seriously, Cody’s Lab is one of my favorite channels. Cody, you rock man!

This is one of the coolest things youve done actually. I love old tech and I'd love to see you try to improve this in terms of speed. great job cody

someone should make a youtube channel doing all the old scientific stuff like this and maybe have a series doing all the old experiments that got us to were we are now scientifically. It would be cool to actually see those experiments instead of just reading about them.

This is one of these information videos you want to stick with until the end. Thanks for the heads up.

I'm glad Cody got to combine two of his favorite things, vacuums and mercury. Such a happy Cody :D

"I made the vacuum" I'm amused by the concept of "making" the absence of stuff.

13:07 wait. did Cody do a tutorial on how to tell if it's 8 o clock at night just by looking outside??? Oo wtf

Here I am, 2 years after my first comment, commenting again. Still one of your best videos!

Very cool. I seen the window display at home depot with 2 of those. I took my high-powered flash light and shined it on there. Made it spin significantly faster. Nice video.

How'd you cut your hand, did the butter strike again.

19:39 Cody's Lab in one sentence.

5 years later and I think you’re still the only person to make one of these in modern times, cool stuff

This is so cool. I love old tech stuff like this. I’d love to learn more about why it generates electricity too.

Wow thats some amazing techonology for 18th century

Definitely one of the neatest vacuum demos I've seen, thanks Cody!

Cody, great video, brings back alot of great lab memorys from Purdue when I was a chemistry major in 75. I have some mercury diffusion pumps from those days and a McLeod vacuum gauge about 18 inch model, have done many vacuum experiments a long time ago, your ingenuity and video reminds me of those ol days.

I love your experiments involving "outdated" technology and techniques.

the science is awsome but the sound of the chickens in the background is the best

19:40 Could you put an electric cord between the 2 mercury jars (maybe also a resistor on it) and power an LED or something? Would be really cool with a Kinetic/mercury powered light :D

Crazy confidence and it worked

Of everyone I have ever seen on youtube I think you cody have caught my attention the most! You are so intelligent and intrigues me to keep watching keep up the amazing work bro!!

notification squad got nothing on patreon squad

Edison's laboratory in Greenfield Village in Dearborn Michigan has a mercury vacuum pump used to evacuate early light bulbs. It is made of glassware, but I've never examined it closely. It is about 15-20 feet from where you can normally get to. Next time I go I'll have to look at it more closely, or ask questions of the docent.

This is one of my favorite KZfaq videos of all time.

great experiment cody. you did very well. thanks!

Would be really cool (and Cody-ish) to make your own light bulb.

17:15 "Lift these hoes up" Cody Slab, 2017

12:25 I love that, glad I re-got into Cody's lab

I really enjoyed your demonstration! Thank you.

Dayum! you are so awesome man! all these cool things you do and make, keep doin em!

Sprengel Pump!!!! Hermann Sprengel was born in schillerslage near my home city hanover, germany. Nice! Btw. The sprengel art museum in hannover has nothing to do with him ;) some useless knowledge for you :D

Bro you are a legitimate genius!

He's got a true scientist's mind, love Cody's Lab

I be have used this mercury pump to extract various gases from transformer oil and to send it through a gas chromatogram, testing for hydrogen. We used 2x three way gas valves to make it work better. And glass syringe fro the collected sample

Cody'sLab , It would be interesting to put a florescent light tube between the reservoirs and see if it remains lit, or how much useful work can be taken from the electrical potential.

So many interesting phenomenons in one experiment! Cool stuff

Loved this video so much interesting information, great job on the pump!

Cody, I love your enthusiasm and curiosity for science and always enjoy your practical and logical use of "low-tech" solutions. Scientists can be prone to groupthink and technological advances, forgetting that simplicity, efficiency, and practicality is an important part of scientific discoveries. Btw, what is the faint trail of vapor falling from the tip of the radiometer at 20:17?

This is one of your most interesting videos. I really enjoyed this one. Also, any possibility of running a light source (LED maybe) off the voltage between the 2 reservoirs? That would just be neat.

Very impressed with the effort here!

This is a fascinating video, I had no idea that this is what they did back in the day!

How many volts is the electrical potential between the 2 pools of mercury?! Would be very interesting to know!

we need to calibrated data to know how much voltage "the shock of my life" was. Please do calibration (self eletrocution under controlled conditions to measure the warm feeling of eletricity) and evaluation video ;)

Hey Cody, as a neon sign glass blower for +25 years I was both cringing and amazed you actually managed to do this! Cheers!!

INcredible stuff Cody!

You should have stuck a volt meter in it to see how much voltage it had!

World's most complicated crack pipe

In my school we actually had a pump similar to that but working with the flow of water so it obviously couldnt make such a strong vacuum. Never understood how it worked though until now. Awesome craftsmanship.

So much science on so many levels.