The measurement of G using the MSL torsion balance

This paper describes the improvements that have been made to our measuremen t of the Newtonian gravitational constant (G) since our last published valu e of G in 1995. As a result of a new measurement of G made with the improve d apparatus, we have discovered some second-order corrections that were omi tted from the previous measurement. New values for G are presented; both fr om the latest measurement and a recalculated value from our previous measur ement. Our latest values are G = 6.6742(7) x 10(-11) m(3) k(-1) s(-2) for t he most recent measurement and G = 6.6746(10) x 10(-11) m(3) kg(-1) s(-2) f or the recalculated 1995 value. These two values agree to within their unce rtainties.