<HTML>Sandy J. Perkins wrote:
>Archae - so far your best answer is "I have no idea how
> it was made."
Until you supply an actual primary reference for this observation you claim exists, that is my best answer... Saying "Primary ref: try Petrie." doesn't help much, since Petrie published quite a few books. Can you be a little more specific... If you cannot supply a primary reference for you assertion that there is a 5 turn 3 foot spiraling striation, than I suggest you retract it. I am not going to answer exaggerations that you present as fact... please state the correct # of turns and the correct length of the striation around the circumference of the core as Petrie describes it.
>Stocks never says he replicated this core in his paper on the
>topic (Ant. 75). If you think otherwise, on what page do you
>find him claiming a spiral cut that looks like the Petrie
>core 7? Unless this core is replicated with a bow drill or other
>ancient means, 'I don't know' is your best bet.
Stocks (2001) has already demonstrated that he can core granite with a bow-powered lapidary coring drill. His drill core is tapered, and there are striation on the surface of the core. Since quartz, feldspar, and biotite are all brittle minerals "ripping" of the grains, although not noted by Stocks, would certainly be expected as well.
Stocks, D.A. (1999) Stone sarcophagus manufacture in ancient Egypt. Antiquity, 73, 918-22.
>Meantime, the methods of Dunn can work and cutting uncured
>granite will definately work.
"can work"... Mr. Dunn has yet to replicated anything observed in this core, and that goes for Miss Morris as well. I still have not been given an answer by Miss Morris for how a scratch is made in a mineral grain that is not solidly and rigidly attached to its surrounding mineral grains.
<snip>
>Corundum? Not in the 4th Dynasty and
>you know that - come on now!
Miss Morris claimed corundum was similar in hardness to synthetic diamond, which is a fallacy... that was the point. BTW, she has apparently been aware of this fact for quite some time, and the last I looked it still appears on her website...
<a href=" [
www.margaretmorrisbooks.com] "> [
www.margaretmorrisbooks.com] </a>
Just making sure you and anyone else who may have read this false claim, is not confused by it.
For someone who "reads" Petrie and quotes (with exaggeration) his 1883 statements as definitive facts, I am rather surprised that you are claiming that corundum was not in the Old Kingdom... does not Petrie write many times about emery (corundum) as an AE primary abrasive. For example Petrie (1932) statments about stone vase manufacturing:
'The mode of manufacture was usually by grinding. The form was first chipped roughly, and the surface then worked down by emery blocks. The direction of grinding was not circular. but diagonal, on prehistoric vases. On the dynastic bowls, the grinding was done circularly in a block...' page 2-3
Petrie, W. M. F. (1977) The funeral furniture of Egypt: with stone and metal vases. Aris & Phillips, Wiltshire.
Corundum in Old Kingdom... probably not in the quantities needed for a large scale abrasive... it has already been demonstrated that quartz can cut granite, so corundum it is not really needed as a primary abrasive. And it has already been demonstrated that quartz grains embedded in the sides of copper coring bits and slabbing saws can produce striations in a single stroke on the surface of granite.
>If you can't replicate this core - which appears to be the
>case - you've got no room to throw rocks at the theories of
>innovative people who come up with ways that will solve the
>problem. They should be heard.
Mr. Dunn and Miss Morris have done no experimentation in coring granite and as a result have not replicated anything, until they do so, all of their claimed about the manufacturing of a granite cores are assumptions that carry very little if any weight.
>So the questions remain wide open: How come Stocks didn't cut
>three feet of granite into a spiral core in one stroke by
>using all that quartz sand?
I have yet to see any primary reference for this observation... Why should Stocks have to demonstrate your exaggerations of Petrie's original observations (which by the way Petrie's original observations are not exactly accurate, according to Mr. Dunn's and others' observations)?
>How come his guys sawed like
>crazy and never produced this feature? Do you expect me to
>think they could've done so in a single stroke given Stocks's
>report of all their hard work and the cutting rates etc.?
>Explain please.
Stocks (2001) describes horizontal striations being present on the core produced in his granite coring experiment, He states:
"...Horizontal striations, similar to ancient ones in rose granite (e.g. the four tapered lifting holes in the lid of Prince Akhet-Hotep's granite sarcophagus, Brooklyn Museum 48.110), were visible both in the wall of the hole, and upon the core." page 93
The striations do not need to represent the feed rate of the drill and could just be the result of how the bow-drill was manipulated during the cutting process. I have yet to see any evidence that the spiraling striations are directly related to the feed-rate of the drill (I asked you this question, you have yest to answer). I do not see that spiraling striations rules out the use of a lapidary coring drill, since it has already been demonstrated that horizontal striation are produced and it is certainly possible that spiraling striations can be produced by the partial rotary motion of a bow-powered lapidary coring drill...
Archae Solenhofen (solenhofen@hotmail.com)
>Sandy</HTML>
