[Theme] Urban geometry

[Thomas Stellwag]

Vernier Scale...

I like this picture,  a large digital clock on the wall could pretend a digital calliper

[Hans_S]

Hans, those last two posts are really good. They complement each other in my eyes too.

  Thanks for sharing it!

Paco, you are making me blush...thank you for the encouragement!

[Hans_S]

reviving old memories - my late father telling how to use a calliper. Since then (60 years have passed) I even forgot the name "Vernier", the military engineer who invented that in 1631.

I have just had to reacquaint myself with the scale as the battery in my $20 Aldi digital caliper has expired! What an incredibly useful invention Monsieur Vernier came up with.

[Hans_S]

I like this picture,  a large digital clock on the wall could pretend a digital calliper

Thank you Thomas.    ...You could also paste up some numbers to make a big slide rule!