2017-10-08 16:46:55 UTC
discovered that water was H2O. I was a bit dubious at the time but I
didn't say so because I wasn't sure whether Lavoisier really knew it
was 2:1. However, I'm reading something today for a colleague in
Boulder who says just that Lavoisier found that water could be
decomposed into hydrogen and oxygen, that Dalton thought it was HO, and
that Berzelius showed that it was H2O. I think she's preobly right, as
that agrees with my recollection, but I haven't checked further.