EQ 4.7: plus sign in denominator should be minus sign
Footnote to section 4.3.1: our definition of rho_oil is in disagreement with EQs 18, 19, and 23 of Batzle and Wang (1992). But, in fact, EQ 19 shuld not be used as this would double apply the temperature effect which is accounted for with EQ 23. (M. Batzle, email 2/25/1999).
EQ 4.12: constant 1.115 should be 1.15