Question

What is the approximate molecular weight of hemoglobin?

Answer 1

J.F. Engelhard determined it to be about `64","000` `"Daltons"` (or `64","458 "g/mol"`) in 1825. He wrote it as `n xx 16000` where `n = 4` iron atoms per hemoglobin.

https://en.wikipedia.org/wiki/Hemoglobin#Research_history