Dr. Max Fomitchev-Zamilov

And you see the horizontal axis is in thousands of an inch. And what we see is that the centers of the outer circles are concentric to within two ten thousands of an inch. And outer surface has, sorry, inner surface has slightly larger scatter. And even, you know, when you feel it to the finger, you see that the inner surface is not as well finished.

And you see the horizontal axis is in thousands of an inch. And what we see is that the centers of the outer circles are concentric to within two ten thousands of an inch. And outer surface has, sorry, inner surface has slightly larger scatter. And even, you know, when you feel it to the finger, you see that the inner surface is not as well finished.

So what this tells me is whatever tool they used to do it, it was like perfectly rigid. And this thing, I assume it was rotated, because I don't see how else you could do it. It was rotated like perfectly axially. So the tool is perfectly rigid and rotation is perfectly axial, like in a chuck of a modern lathe.

So what this tells me is whatever tool they used to do it, it was like perfectly rigid. And this thing, I assume it was rotated, because I don't see how else you could do it. It was rotated like perfectly axially. So the tool is perfectly rigid and rotation is perfectly axial, like in a chuck of a modern lathe.

So what this tells me is whatever tool they used to do it, it was like perfectly rigid. And this thing, I assume it was rotated, because I don't see how else you could do it. It was rotated like perfectly axially. So the tool is perfectly rigid and rotation is perfectly axial, like in a chuck of a modern lathe.

to where even though you can feel it, but each slice is still perfectly concentric, you know, better than one thousandth of an inch. That was pretty amazing. And this is like the most precise vase in the collection, according to my analysis. So that was pretty mind blowing to me. So what else is there? Yeah, and this is a less precise vase. It's the other vase that we saw for comparison.

to where even though you can feel it, but each slice is still perfectly concentric, you know, better than one thousandth of an inch. That was pretty amazing. And this is like the most precise vase in the collection, according to my analysis. So that was pretty mind blowing to me. So what else is there? Yeah, and this is a less precise vase. It's the other vase that we saw for comparison.

to where even though you can feel it, but each slice is still perfectly concentric, you know, better than one thousandth of an inch. That was pretty amazing. And this is like the most precise vase in the collection, according to my analysis. So that was pretty mind blowing to me. So what else is there? Yeah, and this is a less precise vase. It's the other vase that we saw for comparison.

Yeah, and you can see that the concentricity was all over the place. It's like 20 thousandths, 40 thousandths. It's almost... hundred times worse, you know, than for this. But, you know, visually you look at it, it doesn't look that different. But, you know, once you put this slices under the magnifying glass, you see.

Yeah, and you can see that the concentricity was all over the place. It's like 20 thousandths, 40 thousandths. It's almost... hundred times worse, you know, than for this. But, you know, visually you look at it, it doesn't look that different. But, you know, once you put this slices under the magnifying glass, you see.

Yeah, and you can see that the concentricity was all over the place. It's like 20 thousandths, 40 thousandths. It's almost... hundred times worse, you know, than for this. But, you know, visually you look at it, it doesn't look that different. But, you know, once you put this slices under the magnifying glass, you see.

So the bottom plot there shows you kind of like if you shoot at the target, right? You know, where your bullets land. Those are the centers of all the inner and outer slices for the precise vase. And you can see they're, you know, pretty well aligned, you know, like amazingly well aligned. Whereas for the other vase, they're not nearly as well aligned. Yeah, you know, that's for the other ways.

So the bottom plot there shows you kind of like if you shoot at the target, right? You know, where your bullets land. Those are the centers of all the inner and outer slices for the precise vase. And you can see they're, you know, pretty well aligned, you know, like amazingly well aligned. Whereas for the other vase, they're not nearly as well aligned. Yeah, you know, that's for the other ways.

So the bottom plot there shows you kind of like if you shoot at the target, right? You know, where your bullets land. Those are the centers of all the inner and outer slices for the precise vase. And you can see they're, you know, pretty well aligned, you know, like amazingly well aligned. Whereas for the other vase, they're not nearly as well aligned. Yeah, you know, that's for the other ways.

So you can see when they were machining the outer surface and the inner surface, there was a drift, like systematic drift on the tool. So what are the blue and orange lines here? So the blue line is the centers of the circles of the outer surface, and red is the centers of the circles of the inner surface. So when they were machining it, either, you know, the tool was turning,

So you can see when they were machining the outer surface and the inner surface, there was a drift, like systematic drift on the tool. So what are the blue and orange lines here? So the blue line is the centers of the circles of the outer surface, and red is the centers of the circles of the inner surface. So when they were machining it, either, you know, the tool was turning,

So you can see when they were machining the outer surface and the inner surface, there was a drift, like systematic drift on the tool. So what are the blue and orange lines here? So the blue line is the centers of the circles of the outer surface, and red is the centers of the circles of the inner surface. So when they were machining it, either, you know, the tool was turning,

or the bit was drifting. So there is systematic motion to it. And you can trace that motion because you got two lines. Whereas for this, there wasn't the systematic motion. So you got this just scatter. And that scatter was so tightly picked, if you overlay it on top of it, it would be just a dot. Because, you know, they were different scales. So this is like tenth of an inch, right?

or the bit was drifting. So there is systematic motion to it. And you can trace that motion because you got two lines. Whereas for this, there wasn't the systematic motion. So you got this just scatter. And that scatter was so tightly picked, if you overlay it on top of it, it would be just a dot. Because, you know, they were different scales. So this is like tenth of an inch, right?

or the bit was drifting. So there is systematic motion to it. And you can trace that motion because you got two lines. Whereas for this, there wasn't the systematic motion. So you got this just scatter. And that scatter was so tightly picked, if you overlay it on top of it, it would be just a dot. Because, you know, they were different scales. So this is like tenth of an inch, right?