OneGuyFromBarlick

I had no idea what the last object was but I do know what this one is. I'll keep quiet!

Good man! Let's hear if anyone else remembers......

the socket set version of adjustable spanner - very useful with partially nadgered nuts or hand-made stuff, especially the latter.

You've got it. I have had it in the kit for over 30 years and never needed it once!
Next one?

I've used ours a few times ... sometimes the nuts and bolts have needed serious persuading ! usually because they are rusted into the timber.

Ha! That's what I was going to try to explain it as, though I didn't know what they were called.
( I shall pat myself on the back for my unspoken thoughts)

That counts as a win Maz.
Come on you lot, next one?

All right I give in! Try this one....

Some form of metal ingot making. Molten metal poured from the furnace at the back, cools as the ring is rotated to the man at the front who removes the ingot. Third man barrows them away.

Very close Ian but incorrect, it's not metal.

Soap??

Bricks?

Like Ian, I think I guessed pig iron last time around.
an addition:

Surely, that's the frozen treacle bricks production line ?

Bricks is getting very close..... Good Man China.....

Blocks of tallow?

China knows what it is, he got the right answer last time but was magnanimous to hand it to Panbiker. Then Tizer gave a explanation and Stanley turned purple. I like this game.

Nobody has said yet what's going on! [I never turn purple.....]

Well I'm going to say that it's slag.

Yes Wendy..... In some parts of the country they are favoured building material especially in walls. They are very closely related to glass and are almost indestructible.
Next for shaving?

Stanley's reply to the original Mystery object. " I missed the response. Yes, they are making large blocks of solidified slag for use in buildings. I have only ever seen them in external structures and they were virtually indestructible, just like dirty glass. The ones I have seen are purple."

Colours tend to range from red to black depending on iron content and processing conditions. Here's my post from the last time this mystery object was aired: LINK

What a repository of obscure knowledge the site is! Good link Tiz.
I remember reading once that the way 'slag wool' was discovered was that molten slag came into contact with a leaking steam pipe and someone was smart enough to realise that the filaments of solidified slag that were formed had a value as a non-flammable insulating material..... Shades of Grenfell.....

Try this one. Can anyone tell me what the significance of this picture is? A clue, the location is the Isle of Eigg.

Last visit to the island by a steamer?