Image talk:Pitch drop experiment.jpg

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[edit] Dispute replaceable

This is not practically replaceable for several reasons, which are quite clear if one reads the Pitch drop experiment article.

It would required access to a bell jar for many many years

"In 1930, the seal at the neck of the funnel was broken, allowing the pitch to start flowing. Large droplets form and fall over the period of about a decade. The eighth drop fell on 28 November 2000, allowing experimenters to calculate that the pitch has a viscosity approximately 100 billion times that of water."

That's a SEVENTY year experiment, a lifetimes worth of experiment. This is unlikely to be replicated any time soon by a wikipedian. The article further goes on to state that this is the longest running recorded experiment.

Please don't remove this image, it is irreplaceable and therefore justifies fair use. User A1 12:46, 12 December 2006 (UTC)

No one is saying the experiment is repeatable. The photograph itself is replaceable because anyone with a camera could go the room at the University of Queensland where the bell jar is kept and take a picture of it. —Angr 12:54, 12 December 2006 (UTC)

But no one has, so why not wait until someone does before we delete it? It's encyclopedic, we have permission, it fits the fair use rationale... I don't understand why this would be deleted without already having a replacement. Snoutwood 01:55, 14 December 2006 (UTC)