Editing Pitch drop experiment (section)

==Demonstrations of Lord Kelvin==
[[File:Kelvin pitch glacier.JPG|thumb|right|Kelvin's glacier model]]
In the [[Hunterian Museum]] at the [[University of Glasgow]] are two pitch-based demonstrations by [[Lord Kelvin]] from the 19th century. Kelvin placed some bullets on top of a dish of pitch, and [[Cork (material)|cork]]s at the bottom: over time, the bullets sank and the corks floated.

Lord Kelvin also showed that the pitch flows like [[glacier]]s, with a [[mahogany]] ramp that allowed it to slide slowly downward and form shapes and patterns similar to glaciers in the [[Alps]].<ref name="BBC1" /> This model was considered as an inspiration for the expected properties of [[luminiferous aether]].<ref>{{cite journal | doi = 10.1007/s00016-006-0310-6 | title = The Physical Tourist Physics in Glasgow: A Heritage Tour | author = Johnston, S.F. | journal =  Physics in Perspective | volume = 8 | pages=451–465 | year=2006| issue = 4 | bibcode = 2006PhP.....8..451J }}</ref><ref>{{cite book | chapter-url = https://archive.org/details/scientificpapers0030unse/page/276/mode/2up?q=pitch | author = Baron Kelvin of Largs | title = Scientific Papers: physics, chemistry, astronomy, geology, with introductions, notes and illustrations - Volume XXX | year = 1910 | chapter = The Wave Theory of Light}}</ref>