Why is the head of a Guiness white?

[guajolote]

http://www.newscientist.com/lastword/artic...le.jsp?id=lw997

Near the edge of the drop of foam it was possible to find isolated examples of bubbles, and by viewing objects held behind these it was clear that they were acting as tiny divergent lenses.

[davidbdesilva]

That is why, when properly poured, a Guinness forms a perfect "Bishop's Collar" (the black robe with the neat white collar), which BTW, is one of my favorite neighborhood pubs in Philly. The Bishop's Collar- "Salvation by the Pint"!

[hollywood]

Ordinarily, I wouldn't put much stock in this, however, since the study was repeated several times with the same results who am I to argue?

[klinger75]

Has anyone heard the myth that you can float a coin on top of the head of a perfectly poured guiness? Any truth to this?

[elyse]

I'm dyin' for a Guinness now.

Not tried the coin trick, but certain coins from around the world, are pretty darn light.

[hollywood]

I'm dyin' for a Guinness now.

Not tried the coin trick, but certain coins from around the world, are pretty darn light.

Now that you mention it, I'd think most coins with holes in the middle would stand a good chance of staying atop the head.

[elyse]

Really, I'd imagine a hole would aid sinkage.

[Blondie]

Has anyone heard the myth that you can float a coin on top of the head of a perfectly poured guiness? Any truth to this?

I'd gladly experiment if it weren't so difficult to find a perfectly poured pint of Guinness in NYC aside from at Paddy Reilly's. Where are the other perfect pints?

Has anyone had luck pouring a great pint from the nitro-charged cans?

[elyse]

I've heard Dublin House is one of the few places to have a Guinness. Haven't been there in a while though.

[Blondie]

I've heard Dublin House is one of the few places to have a Guinness.  Haven't been there in a while though.

Thanks, elyse. I'll try it next time I'm in the vicinity

[elyse]

Now I'm afraid.

[Blondie]

Now I'm afraid.

[klinger75]

Has anyone heard the myth that you can float a coin on top of the head of a perfectly poured guiness? Any truth to this?

I'd gladly experiment if it weren't so difficult to find a perfectly poured pint of Guinness in NYC aside from at Paddy Reilly's. Where are the other perfect pints?

Has anyone had luck pouring a great pint from the nitro-charged cans?

What about Kinsale in the upper 90's. I remember them having one of the best pours in the city. This was about ten years ago, not sure if it is still around.

[hollywood]

Really, I'd imagine a hole would aid sinkage.

Somewhere there's a surface tension expert who could resolve this for us. I think a hole would add some bouyancy.