Custodian of world's longest running experiment dies

Aug 26, 2013
This undated photograph released on August 26, 2013 shows John Mainstone (3rd L) with students examining the world's longest running laboratory test, the Pitch Drop Experiment. Mainstone died last week after overseeing the experiment for over half a century.

The science professor who oversaw the world's longest running laboratory test—the Pitch Drop Experiment—has died after more than half a century on its watch, his university said Monday.

John Mainstone, the former head of the Department of Physics at the University of Queensland, was in charge of the experiment which demonstrated the fluidity and of pitch, a tar derivative once used to waterproof boats.

The experiment, established in 1927 by Professor Thomas Parnell, was designed to show that pitch, although it feels solid and can be shattered by a hammer blow at room temperature, acts like a fluid and flows through a glass funnel over time.

It took three years for the pitch to settle and then the glass funnel holding the substance was cut to allow it to flow out.

In the 83 years since then, only eight drops of pitch have fallen and no one has seen one actually fall, the university said.

Earlier this year Mainstone, who died last week aged 78 after suffering a stroke, said it looked like the next would fall before the end of 2013.

"It's got a mind of its own and in blink of an eye it can drop," the professor, who had monitored the tar's glacial movements for 52 years, told the Australian Broadcasting Corporation.

The head of the School of Mathematics and Physics at Queensland University Halina Rubinsztein-Dunlop, said Mainstone would be greatly missed.

"Professor Mainstone's dedication to the long-running experiment well past his official retirement ensured that media, researchers and undergraduate students had easy access to relevant information and an understanding of the important science behind it," she said.

"John's death is particularly sad as in his time as the custodian of the experiment, he did not see a single drop fall," she added.

The experiment is under constant surveillance, with three webcams trained on it to capture the ninth drop's fall on camera.

Explore further: It's particle-hunting season! NYU scientists launch Higgs Hunters Project

add to favorites email to friend print save as pdf

Related Stories

High-angle helix helps bacteria swim

Aug 13, 2013

(Phys.org) —A high-angle helix helps microorganisms like sperm and bacteria swim through mucus and other viscoelastic fluids, according to a new study by researchers from Brown University and the University ...

Perfect pitch may not be absolute after all

Jun 11, 2013

People who think they have perfect pitch may not be as in tune as they think, according to a new University of Chicago study in which people failed to notice a gradual change in pitch while listening to music.

A new way to train your ears

Jul 16, 2013

Can you tell whether the first note in a catchy new tune is an A flat or a B flat? If yes, then congratulations. You have the exceedingly rare gift of perfect pitch.

Recommended for you

Particles, waves and ants

Nov 26, 2014

Animals looking for food or light waves moving through turbid media – astonishing similarities have now been found between completely different phenomena.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.