  We use the conductimetric method, adequate to electrolytes, to determine the
lysozyme charge in lys-water and ternary lys-salt-water systems. We measured
also the viscosities for the above binary and ternary systems in the same
conditions at pH$=4.5$ and T$=298$ K, measurements that allow us to see any
effect of viscosity on cations mobilities and implicitly on the lysozyme
charge. The method is illustrated for the lysozyme chloride aqueous solution
system at 25$^o$ C, using the data reported here for pH$=4.5$ at 0.15, 0.6,
0.8, 1., 1.5, 2., 2.5, 3., 3.5 mM (mg/mL) lysozyme chloride concentrations. The
method was also applied to ternary lys-salt-water systems in the same
conditions at pH$=4.5$ and T$=25^o$ C. Ternary conductivities are reported for
a mean concentration 0.6 mM of lysozyme chloride in all systems and a mean
concentration 0.01, 0.025, 0.05, 0.1, 0.175, 0.2, 0.5, 0.7, 0.9, 1.2, 1.3 and
1.4 M for NaCl; 0.005, 0.01, 0.05, 0.1, 0.175, 0.2, 0.5, 0.7, 0.9, 1.2, 1.3,
1.4 and 1.5 M for KCl; 0.005, 0.01, 0.05, 0.1, 0.175, 0.2, 0.5, 0.7, 1.2, 1.3,
1.4, 1.5, 1.6 and 1.7 M for NH$_4$Cl.
