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version 1.2.3, 2007-11-27

- carb function modified to allow NA values in the input data. A warning is returned if this happens but all other data rows are processed. Change made by Bernard Gentili.

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version 1.2.2, 2007-09-09

- correction of the definition of PiH and PhiH in the "carb" documentation file
- BetaD is the Revelle factor (the "carb" documentation has been updated
- cosmetic changes to some documentation files

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version 1.2.1, 2007-08-21

- cosmetic changes to some documentation files

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version 1.2, 2007-08-21

- added function "speciation" which estimates the concentration of the various ionic forms of a molecule as a function of pH (contributed by Karline Soetaert)
- added function "kconv" which provides conversion factors to change the pH scale of dissociation constants (contributed by Karline Soetaert)
- added function "pHconv" which provides conversion factors for changing the pH scale (contributed by Karline Soetaert)
- added function "Kn" which provides the ammonium dissociation constant (contributed by Karline Soetaert)
- added function "Khs" which provides the dissociation constant of hydrogen sulfide (contributed by Karline Soetaert)
- added function "Ksi" which provides the Si(OH)4 dissociation constant (contributed by Karline Soetaert)
- added function "bjerrum" which makes a bjerrum plot (contributed by Karline Soetaert)

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version 1.1.1, 2007-08-14

- bor(), K1(), K1p() and K2() now return the values
- return values are now set for all variables
 
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version 1.1, 2007-07-24

- carb() has now 5 more flags (code contributed by Jim Orr):
	# flag = 21     pH-pCO2 given
	# flag = 22     pCO2-HCO3 given
	# flag = 23     pCO2-CO3 given
	# flag = 24     pCO2-ALK given
	# flag = 25     pCO2-DIC given 

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version 1.0.5, 2007-07-23

- minor changes to the documentation (tried to have the superscripts right)

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version 1.0, 2007-01-08

- added function phinsi which calculates the pH at in situ temperature from pH values measured in the laboratory and other ancillay data

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version 1.0, 2007-01-08

- a test data file is now provided
- various cosmetic changes

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version 0.98, 2006-05-07

- data entry via a file is NO LONGER possible
- results of the carb command are no longer automatically saved in a file
