This question has been closed: How was mass increase measured? because:
I’m voting to close this question because it concerns the history of physics – Bob D
Closed. This question is off-topic. It is not currently accepting answers.
I have been around for a few years and have never heard anything so weird.
There are loads of questions bordering history, but mine does not:
And many more concerning past experiments:
- How to measure the mass of the electron?. I have chosen two examples answered by an illustrious member, and I hope there was no discrimination.
As I clearly explained, the question was absolutely legitimate, since in 1894 the mass spectrometer was not yet available and Thomson had not even discovered the electron. Is that really off-topic?