If you photograph a sediment core, you do that with a ruler or measuring tape next to this core. But if you take an X-ray? You won't see a measuring tape! And you might see a ruler, but not its tick marks. So in anticipation to a return to hospital I invoked the help of our spiffing lab tech Jess and set out to make an X-ray measuring tape. One needs: duct tape, garden wire, and pliers. And a steady hand! Which we all had. And I think we made a spiffing specimen.
We folded the duct tape double, which means you can't directly see the wire, but the shape comes through and you can see the ticks perfectly. We're ready for hospital!