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originally posted by: FlySolo
But clearly, the tools you describe as being the only ones they have, are not able to cut like you suggest.
These experiments demonstrate that the ancient Egyptians could have, using simple technology and the material available to them during their history, worked rocks with copper, bronze, and iron saws. It would be expected that for soft stones like limestone it was routinely used. In the case of hardrocks like granite, the expense incurred by the loss of copper during the cutting process (less with bronze and iron) would restricted it to royal monuments, for usage where other tools would not suffice (Arnold 1991).
originally posted by: FlySolo
a reply to: Xtrozero
No, you're showing a completed cut in the wood picture. The stone pictures you can see the entry mark from the blade. It's tapered as the blade touches the rock then moves to the right. You can't get this with a hand saw, only a circular saw.
originally posted by: FlySolo
a reply to: skalla
Because of the speed they were done. abrasive technology is too slow to end up with three cut marks beside each other for no good reason. That's all
How do you know they are quick cuts from those small pictures. Genuinely interested.
So are you saying that you know they were quick cuts because of the speed they were done?
And are you suggesting that you somehow know (rather than speculating) that these cuts were quickly done one after the other? If so, how?
originally posted by: FlySolo
a reply to: Xtrozero
Yeah, all three are different because they're all test cuts, like I said in the first place. And it's not an assumption btw. I thought it out before I said it. My reasoning is, if the cut was from the other direction, then it would be deeper than it currently is because of the angle the saw would have to travel to get the length of the cut. Know what I mean? There's only a 1 inch cut at the far right, but it's all the way down the length of the rock. It's not physically possible to make a cut like that from the right to left. With a hand saw to boot. Must be a circular saw and those are the entry points.
Look at this one again closely and think about it.
Not sure why you say it can not be done with a straight saw. The top one really looks like a saw or abrasive string cut. Sliding an item back and forth with a harder abrasive material between it and the rock will get you this type of cut.
originally posted by: FlySolo
a reply to: Xtrozero
Not sure why you say it can not be done with a straight saw. The top one really looks like a saw or abrasive string cut. Sliding an item back and forth with a harder abrasive material between it and the rock will get you this type of cut.
If I have to explain to you why it's physically impossible to get that shape of cut with a back and forth string motion then idk. You just can't. Not looking for complicated means, just saying those theories don't work.
The rate of rock removal is similar for both the wet and dry sand tests at about 12 cm3/hour. Stocks (2001), after comparing the ratios of volume, weight, and depth of removal between the copper saw blade and the granite block (Fig. 8), concludes that the dry test with its flat-edged blade is distinctly better than that of the wet sand test with its notched blade. This is the result of the rate of degradation of the copper saw blade being greater in the wet tests, resulting in a more costly enterprise. As well, the tailing from dry cutting can be collected and used for other purposes. Because of the inexperience of the work teams in these modern experiments, it was suggested by Stocks (2001) that the rate of cutting could be increased by a factor of 2 with increased experience.
originally posted by: skalla
a reply to: FlySolo
So what is the circular saw made of and how is it powered?