The ratios

of electrical conductivities of potassium chloride (KCI) solutions of known concentration (

) to standard seawater at the same temperature have been measured at

C and

C for solutions with

between 0.96 and 1.04. The "normal" concentration (

) giving

was found to be

gKCI/kg solution. The effect of temperature on

was measured over the range

C to

C. Equations are given for KCI concentration as a function of

and the inverse function, for

as a function of

(to allow use of a laboratory salinometer for the KCI-seawater comparisons), and

as a function of temperature.