EP 202 — John Stuart Reid: The Sound of Life
Spirit Gym with Paul Chek
00:00
Drilling Experiments With Tubular Drills and Granite
One of the objects in flinders petri's museum is a granite cylinder that he found in just a rubbish heap. If you study it closely, there are helical grooves on it that go round and round and round. I think one of them has about 12 different turns, right? Continuous, unbroken. Now, somebody wrote that this meant that they had incredible a drilling prowess,. That they could literally drill into a hard stone as if it was going into butter. Well, my theory is the exact opposite to that. What they were doing was extracting this drill while it was still turning. The reason is because you don't want to stop your animal. So your animal is just
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