What articles made of Iron and Steel can you think of, which are essential to our daily lives.

Let’s see how that compares with my list.

STRUCTURES

AGRICULTURAL TOOLS

IRON IN THE HUMAN BODY

PERSONAL TRANSPORT

FREIGHT TRANSPORT

MAGNETS

COMPASSES

ELECTRICITY GENERATORS

RE-INFORCING CONCRETE STRUCTURES

TOOLS

COOKING POTS

PRESSURE VESSELS

PIGMENTS

BEARINGS

That’s enough for now I think.

Metals: Malleable  Ductile Conduct Energy Can form alloys 

Element Atomic Wt % Earth's Crust % Earth Mass % Core (?)

Oxygen 15.99 46.7 30.1  

Silicon 28.08 27.7 15.1  

Aluminium 20.98 8.1 1.4  

Iron 55.85 5.1 32.1 88.8

Calcium 40.08 3.7 1.5  

Sodium 22.99 2.8    

Potassium 39.09 2.6    

Magnesium 24.30 2.1 13.9  

Sulphur 32.06 <1% 2.9 4.5

Haematite Brazil

Haematite India

Sweden

As S. Wales

Beneath the spreading chestnut tree

The village smithy stands 

A bit of History

• Copper

• Gold

• Bronze

• Iron

Iron ore + Limestone

2: coke

3: conveyor belt

4: feeding opening, with a valve that prevents direct contact with the internal parts of the furnace and outdoor air

5: Layer of coke

6: Layers of sinter, iron oxide pellets, ore,

7: Hot air (around 1200°C)

8: Slag

9: Liquid pig iron

10: Mixers

11: Tap for pig iron

Human HaemoglobinHEME Group

The disc rotates with angular rate ω, sweeping the conducting radius circularly in the static magnetic field B. The magnetic Lorentz force v × B drives the current along the conducting radius to the conducting rim, and from there the circuit completes through the lower brush and the axle supporting the disc. Thus, current is generated from mechanical motion.

Faraday's Disk Generator

Parts of an AC Generator

 Rotor

 Stator

 Armature

 Field

 

Rotor AC generator at Hoover Dam USA

NEBULA IN ORION

Thanks and Acknowledgements 

Wikipedia, the free encyclopaediafor most of the illustrations

  

Anthony Beard and members of Cardiff Castle Garrison Society,And David Melhuish, for the loan of the swords.