[NTG-context] Typesetting chemical reaction equations

[Ville Voipio]

> And how do I switch off the equation numbering for the chemical 
> reactions (I'd like to have the mathematical formulae still numbered)?

Stupid me. Just by leaving the \placeformula out. (Maybe I should go and 
get something to eat, my brain seems to be in some sort of energy-saving 
mode.)

By the way, is there a simple way to have two separate numbering 
schemes? If I wanted to have chemical formulae numbered with 1,2,3,4... 
and maths with i, ii, iii, iv, ... , how should I do it? It must be 
documented with \placeformula, but is \placeformula documented anywhere 
apart from the code itself? (Yes, I am lazy.)

- Ville