Thimble Battery - Objectivity 230

[@shivig6840]

this channel deserves so much more popularity

[@Melomathics]

The expression "about my person" to mean "on me" is perhaps the most British thing I've heard in a long time : )

[@StarkRG]

I don't think it's particularly common these days.

[@Melomathics]

@@StarkRG Are you calling Keith old fashioned? How dare you??

[@LiLi-or2gm]

Wollaston also worked with optics- he invented the Wollaston prism that separates light into two orthogonally polarized beams.

[@ZeedijkMike]

I probably said this before - but the two of you are brilliant together. Always an interesting object to explore.

[@ASilentS]

Now we just need Neil from Periodic Videos to build one!!!

[@trulyinfamous]

I would love to see them do a video on batteries.

[@Butitdo910]

Neil is so jacked he would probably flatten the thimble with his bare hands.

[@summertilling]

Apparently a "line" is a unit of measurement equal to either a twelfth or a fortieth of an inch. I'd never heard of it before.

[@ragnkja]

I assumed it was the thickness of the thinnest lines in the drawing.

[@Grantallica]

That's imperial measurement systems for you 😂

[@Markle2k]

@@Grantallica This is from 1811. The Imperial System of Measures wasn't codified until 1824, and the line was not included.

[@roderickwhitehead]

1 line is ¼ barleycorn. There are 6 points in a line.

[@NecrosAcolyte]

The only other place i have heard it used is on the design for the Mosin-Nagant rifle, which was also called the three-line rifle, being 7.62mm

[@MisterTalkingMachine]

That platinum wire is also called Wollaston wire as far as I can recall, he invented a method to produce extremely thin wire out of it. One of the uses of it was in an early radio detector, called a barreter detector. Edison also experimented early on with wollaston wire to make his high resistance bulbs but put it aside because it was too expensive iirc.

[@una_10bananas]

Always nice to see a new objectivity video!

[@Ana_crusis]

Thank god you're back still doing your videos. We really need anything that smacks of the old normality. Thanks Brady

[@leppeppel]

It's funny; as soon as Keith started explaining what it was, my thoughts immediately went to the radiometer tie pin.

[@n20games52]

So that's what thimbles are for! :D Very cool!

[@imagineaworld]

The inventor is looking down saying "lol they really like that little piece of junk" xD

[@theforgottenbrawlers]

Do you have something about Egypt? Not necessarily mummies but maybe some papers on expeditions to Egypt ? Thamks

[@phoule76]

ha, Brady. "You better go put it back on charge."

[@anacronisticcurmudgeonry525]

"Just happen to have sulfuric acid on my person." Yep, for lighting period matches.

[@iagocasabiellgonzalez7807]

2:45 So the lightbulb was invented way back, before Edison was even born...

[@Navarro1030]

Edison is responsible for developing a filament reliable enough to be sold. As Keith said other wires burn, melt or only get hot without lighting up.

[@Muonium1]

hardly. platinum based incandescent demonstrations were neither practical, long lasting, or affordable and never produced enough light to even read a book by at a reasonable distance. demonstrating mere incandescence induced by electrical current is a long way away from creating a real and useful light bulb, which is what Edison did.

[@gernotbindet7458]

It is a fancy cigarette lighter, essentially. But i think I'd prefer Döbereiner's lighter.

[@JMThought]

Love objectivity. Impressive social distancing skills here to bring us another video, or was it pre-lockdown and you’ve fallen out? :P

[@ObjectivityVideos]

Haha - thankfully it's the former. We're working hard to keep filming videos in a safe, socially distanced manner. Thanks for tuning in! - James

[@AsbestosMuffins]

seems like something highschool chemistry classes ought to try making

[@Muonium1]

I bet it was used to light cigarettes, candles, etc. as a demonstration. It seems like the only possible "practical" use.

[@unvergebeneid]

Are there like standard lines that were used for measuring distances back in the day? Because in my world lines come in all lengths and sizes.

[@wolfgangmcq]

The line was variously defined as anywhere between a tenth and a fortieth of an inch, though at the time it was in common use the inch hadn't yet been fully standardized either. In this context I think it means "get them as close as possible without letting them touch".

[@CelestialVeggie]

Awesome, and also, very odd!

[@Eliphas_Leary]

That's proto-steam-punk. Most badass.

[@social3ngin33rin]

omfg, I have large radiometers!!! I need to find a any radiometer now!!!! :D

[@duncanw9901]

100 bucks somebody used that to light tobacco at some point

[@nikolausluhrs]

I would definitely buy radiomiter based accessories just sayin.

[@h2_]

What is this unit "a line" that they are talking about?

[@DeoMachina]

its like a big cat

[@wolfgangmcq]

Some small fraction of an inch, probably a twelfth or a sixteenth. (Definitions vary as units hadn't been fully standardized yet when the line was in common use.)

[@edgeeffect]

Where we say "micro minature" or "nano tech" these days.... victorians would say "thimble"!

[@wolfgangmcq]

What we consider "small" keeps shrinking. So-called "sub-miniature" connectors are now some of the biggest and clunkiest things I work with.

[@jurjenbos228]

You could use it to light an LED... Oh wait.

[@trollriders5682]

Are we just going to ignore Keith flipping us off at 2:57?

[@mahejeah]

e-lighter

[@oldcowbb]

grand illusion: give it to me, that thing, your toy

[@Jonathan-yh7cr]

Probably safer than the Samsung Galaxy Note 7

[@kimrosland]

Hi

[@henrymach]

And you guys didn't bother building a reproduction to demo the demo? You're lazy