Charlotte Froese Fischer
![Fischer at EDSAC](https://upload.wikimedia.org/wikipedia/commons/a/ab/EDSAC_%2816%29.jpg)
The experimental discovery of the negative ion of calcium was motivated by her theoretical prediction of its existence. This was the first known anion of a Group 2 element. Its discovery was cited in Froese Fischer's election to Fellow of the American Physical Society. Provided by Wikipedia
1
Published: 1969
Superior document: Rheinische Ausgrabungen 5
2
Published: 1963
Superior document: Die Bilderschüsseln der römischen Töpfer von Rheinzabern [Textband]