ri(T) calculation tools
target README
base class for RI matching
correct ref for glycerol
add to README spec
more verbose calc coeffs doc
refactor to class, maintaining function
create Substance class
match implementation everywhere else
specify mass of lab scoop
unit cost defaults to 0
calculate number of lab scoops of solute
string creation to Substance
proc.salt() shows how to get info simply
todo
sensible recalculation of density / n
move ri correction to class
typo
basic command line usage
crc aqueous soln pdf