There's a bump on the nub on the foram on the shell on the stage in the middle of my scope.

I think some of those bumps are in fact bits of broken diatom. Be sure to zoom into that last one.

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@Fumon I also take requests, if practical. Anything you'd like to see under the scope?

@hackerfriendly How about investigating the surface smoothness of a common cheap fork? IKEA or similar?

Or perhaps the nozzle of an inkjet printer.

@Fumon A fork would be way too big, but a print head might work. I'll see what I can dig up.

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