Purifier, on 15 June 2012 - 07:07 AM, said:
Not exactly sure what you're getting at, Jules. But I never seen any "circular saw marks" on any Egyptian blocks, not even in C. Dunn's photos on his website(s); like he claims. Look all like straight cut marks to me, but I guess it's easy for individuals like C. Dunn to technically over-analyze things like that.
What Im getting at is there is evidence of tube drill use in ancient Egypt, though not of the actual bits used. There is evidence left in granite that straight slab saws were used to saw stone, though no evidence remains of these saws. Petrie describes;
"That the blades of the saw were of bronze, we know from the green staining on the sides of the saw cuts, and on grains of sand left in a saw cut.
The forms of the tools were straight saws, circular saws, tubular drills, and lathes.
The straight saws varied from .03 to .2 inch thick, according to the work; the largest were 8 feet or more in length..." "...No. 6, a slice of diorite bearing equidistant and regular grooves of circular arcs, parallel to one another; these grooves have been nearly polished out by cross grinding, but are still visible. The only feasible explanation of this piece is that it was produced by a circular saw."
But there are no existing remains of circular saws.....
Do you notice a pattern beginning to emerge here? No evidence left of the tools remaining..
Dunn references the so called Rosetta stone of Abu Rawash. He speculates that the concave rosetta stone was cut with a saw with arc radius 7.218m.
Circular saws are cited but I cant see why a pendulum style saw couldnt also scribe an arc or circular type cut.