Posted on 12/03/2019 12:54:33 PM PST by wildbill
A good point, one that has occurred to me. Also, geopolymer molding does not explain the existence of the holes... one does not 'mold' a hole without a (removable) form of some kind inserted... and perfectly round and perfectly spaced?
And what sort of mold did they use to form the 'H' blocks with such perfectly smooth sides and perfectly square rabbets? Surely not wood - of which there was little available on the alto-plano - hand-hewn.
Houston Museum of Natural Science. They once had a pitiful handful of Egyptian relics and the mummy of Ankh-Hap.
Their newer dedicated exhibit hall is much better. The shabby items I referred to were ordinary everyday items: pottery, combs, ointment jars, chairs, shabti dolls, senet boards, sandals and such. I did see some masterfully done statues and pectoral necklaces.
The impression of "shabbiness" was magnified by being adjacent to an exhibit of Late Renaissance - Baroque firearms.
Think of it as stuff that could easily be dug up by tomb robbers, sold to victorian era tourists in cairo as keepsakes, put in suitcases, smuggled out of egypt by steamer, and then eventually sold or donated to local museums before trading in such objects was deemed illegal. mummies, particularly ptolemaic era mummies of less significant historical value, were sold in bulk to traveling circuses for curiosity draws.
I have never been in the Houston museum so I could be wrong.
This article on Ankh-Hap certainly gives weight to that.
There’s no reason whatsoever a hole could not have been included in the design. Using molds to form those Pumapunku structures was feasible, obviously leaving a hole would be just as simple.
Here’s something I was looking for, my memory isn’t what it used to be.
http://www.pbs.org/wgbh/nova/lostempires/obelisk/cutting.html
http://www.pbs.org/wgbh/nova/lostempires/obelisk/cutting05.html
http://www.pbs.org/wgbh/nova/lostempires/obelisk/images/cuttingslide05.jpg
http://www.pbs.org/wgbh/nova/lostempires/obelisk/cutting07.html
http://www.pbs.org/wgbh/nova/lostempires/obelisk/images/cuttingslide07_2.jpg
http://www.pbs.org/wgbh/nova/lostempires/obelisk/cutting08.html
http://www.pbs.org/wgbh/nova/lostempires/obelisk/images/cuttingslide08_1.jpg
http://www.pbs.org/wgbh/nova/lostempires/obelisk/images/cuttingslide08_2.jpg
It wasn’t necessary to have iron tools or diamond saws.
http://www.freerepublic.com/focus/news/3798099/posts?page=145#145
http://www.freerepublic.com/focus/news/3798099/posts?page=137#137
How do you do that when pouring a soft rock slurry? Small perfectly round (extruded?) metallic tubing perfectly spaced and held in place by ??? ...and then there is forming the groove in which the holes begin. You are possibly a stone mason; I am just a skeptic.
***Using molds to form those Pumapunku structures was feasible***
Again, enlighten this poor initiate how to build a mold for those 'H' blocks with virtually glass smooth surfaces; could you do that with hand hewn wood? What would I make the molds from?
My point is not to argue but to raise legitimate questions - legitimate to my untrained mind. You don't have to respond. I think Davidovits makes a compelling case for his 'geopolymer', but he still raises questions - which perhaps he could answer. It is beyond my ken. Or perhaps some of the engineering was performed much later.
interesting. i was not aware of this. however, it remains to be demonstrated that these individual techniques can be applied to create an actual obelisk with bas relief, actual petri core, or actual sacarphagus demonstrating the accuracy and details achieved by the ancient egyptians, unless someone am not aware of in modern times has actually done it...
Metallic tubing? No need for it. Wood molds, a round log for the holes, finished surface via hand polishing.
One of the favorites of Hatshepsut was the obelisk. That form was around before her, but the Egyptians really went to town when she was on the throne. Her name is on those, which gives the time of origin. Others have different dates and have different names on 'em. At least one of Hatshepsut's is in Rome -- the ancient Romans really liked obelisks, and in an engineering feat of their own, moved a number of them to Rome by sea without cutting them and restacking the pieces.
(I hope I've got these right, I can't view them on this machine)
As a young man, Denys Stocks was obsessed with the Egyptians. For the past 20 years, this ancient-tools specialist has been recreating tools the Egyptians might have used. He believes Egyptians were able to cut and carve granite by adding a dash of one of Egypt's most common materials: sand.
"We're going to put sand inside the groove and we're going to put the saw on top of the sand," Stocks says. "Then we're going to let the sand do the cutting."
It does. The weight of the copper saw rubs the sand crystals, which are as hard as granite, against the stone. A groove soon appears in the granite. It's clear that this technique works well and could have been used by the ancient Egyptians.
Cutting Granite with Sand | PBS Online | NOVA Online | WGBH
Besides cutting clean surfaces on their granite, the Egyptians also drilled cylindrical holes into their stones. A hole eight inches in diameter was found drilled in a granite block at the Temple of Karnak.
"Even with modern tools -- stone chisels and diamond wheels -- we would have a tough time doing such fine work in granite," says Hopkins.
Stocks was brought along to test his theories about how the cores were drilled. Inspired by a bow drill seen in an ancient Egyptian wall painting, Stocks designs a home-made bow drill. He wraps rope around a copper pipe that the Egyptians could have forged. Hopkins and Lehner then pull back and forth on the bow, which is weighted from above. The pipe spins in place, rubbing the sand, which etches a circle into the stone. With the assistance of the sand, the turning copper pipe succeeds in cutting a hole into the granite slab.
Cutting Granite with Sand | PBS Online | NOVA Online | WGBH
With the aid of a bow drill and sand, the pipe has cut a circular hole into the stone. But how can the drillers get the central core out?
Stocks wedges two chisels into the circular groove. The core breaks off at its base. Stocks reaches in and plucks it out, leaving a hole behind not unlike the ones once cut by the Egyptians.
Cutting Granite with Sand | PBS Online | NOVA Online | WGBH
Thanks wildbill, a second time. This has been the best topic in quite a while, long discussions, and bound to be of interest. Hope to get more topics posted next week. Another slow week -- here are the other GGG topics introduced since the previous Digest ping:
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