Buildings are colonized by airborne microbes that enter through windows and through mechanical ventilation systems.

like this building here environments that have mechanical ventilation systems that include filtering, heating and air conditioning.

The ventilation.

The point is that education is not a mechanical system.

This room has fine ventilation.

Completely mechanical. This whole machine is mechanical.

They've gone up the ventilation shaft.

What that's actually doing is, it's sending pulses which are turning a mechanical, a little mechanical arm inside of a relay system, and people built computers out of those electro mechanical relays.

(Mechanical noises) (Music)

(Video) (Mechanical Sounds)

So, mechanical engineering!

But back above ground, these raised ventilation grates for the subway system show that solutions can be both functional and attractive.

You have mechanical systems.

Patented clockwork mechanical man.

If you look at the x axis of this graph, you'll see that what we commonly want to do which is keeping the outdoors out we accomplished that with mechanical ventilation.

Ours is a mechanical age.

Wait, digital or old mechanical?

It's like a mechanical trick.

It's completely mechanical, again, a printer.

See, it's not a mechanical thing.

It's just working with a tuned mechanical system, with very simple parts, but inspired from the fundamental dynamics of the animal.

We blocked them off at night so that they got no ventilation.

They're embedded with mechanical electrical devices, sensors.

So there's mechanical adding machines for instance.

It doesn't matter if your computer's mechanical,

So you think of alternative mechanical parts.

You see the sunbeams coming from the ventilation ducts and the train approaching.

This is the natural posture of a man sitting, squatting for ventilation purposes.

And obviously, nothing can move it immediately like this, but you might have some system, it could be an electrical system or mechanical system, where maybe the behavior looks something like this, where maybe it moves it like that or something.

Mechanical power took the place of manual labor.

The downtime is caused by a mechanical problem.

Tom is studying to be a mechanical engineer.

That's wrong because the theory is quantum mechanical.

Now, of course, Babbage's machine was entirely mechanical.

lots of servo hacking, lots of mechanical stuff.

The ventilation in the room was bad since all of the windows were closed.

Could you lend me a few mechanical pencil leads?

And it's walked away I mean, it's that mechanical.

Because I don't want this to be completely mechanical.

So the real crux of the problem here is, how do you make a system that's a simple device but gives you a large mechanical advantage?

We looked at rooms that were naturally ventilated, where the hospital let us turn off the mechanical ventilation in a wing of the building and pry open the windows that were no longer operable, but they made them operable for our study.

How to take care in five easy steps first of all, you can use natural ventilation.

I get this delightful breeze through here... which I think is important... because ventilation among friends...

This is Baron Wolfgang von Kempelen's mechanical chess playing machine.

And if we now beat up and down (Mechanical sounds)