In 1667, Robert Hooke, published a book called Micrographia. The book is Robert observation under magnifying glass and microscope of different materials, plants etc. Here is take on a razors edge.
Attachment 220184
Attachment 220185
Attachment 220186
Attachment 220187
Attachment 220188
Pretty cool stuff, Martin! :tu
I often remind others that they knew all that a few hundred years ago! :D
Make that 4 or 5 hundred years ago! :o
What did Solomon say .......... "Ain't nothin' new under the sun." ............ or words to that effect ........ :rolleyes:
There we may observe its very edge to be of all kind of shapes, except what it should be. For examining that of a very sharp one, I could not find that any part of it had any thing of sharpness in it; but it appeared a rough surface of a very considerable breadth from side to side, the narrowest part on seeming thinner then the back of a pretty thick knife.
That's awesome!
It made it sound like the microscopic examination of an edge is an exercise in futility!
:roflmao
Martin could you summarize this article in modern day language? I read it but it hasn't really sank in as to what's going on.
what a great catch and time travel! i wonder what approx grit size the hone had that left the edge looking like this?
And think of the skill of the illustrator - this had to be not only drawn but then engraved to make the press piece for printing...
Nice find Martin! I hadn't seen this one before. Thanks for sharing.
Basically he is looking at a razor's edge under a microscope and is surprised to find that something so clean, polished, and smooth with an edge that can clearly cut fine things like whiskers can look so beat up and rough up close. He then goes to speculate whether 'fluid bodies' may also appear rough on the surface and made of small individual particles, which in a sense is atom theory but I'm not sure if that is what he is really alluding to there.Quote:
Originally Posted by S0LITARYS0LDIER
ScienceGuy description is right on, the way i see it as well. The atoms part i know absolutely nothing about!Quote:
Originally Posted by S0LITARYS0LDIER
Simply that fluids (and all matter) is composed of discrete units of something rather than as a continuous 'substance'. i.e. you can separate the fluid water into smaller and smaller amounts but there is a point at which you have to stop at a single molecule and cannot go further without the substance becoming something else (say, oxygen and hydrogen atoms). To some extent we can assume gases and liquids to be composed of hard spheres or particles that bump into each other, which is exactly what he suggested!Quote:
Originally Posted by Martin103
I also found it interesting that he suggested specs of dust or other abrasive microscopic particles on the hone surface could lead to the gouges, pretty spot on. And that he mentioned oil on the hones rather than water.
Very cool. Thanks for sharing.
