Measurement of DC current

[ixu]

I’m getting a little OT, but in the mystery energy theme:

John McPhee has written some great texts that still resonate –

• The Curve of Binding Energy

• Ice Pond in Table of Contents … waaaay ahead of its time and a great short read to inspire confidence in low tech solutions to seemingly intractable issues.

• Minihydro also in Table of Contents.