Magnetization of immobilized particle dispersions with two distinct particle sizes

The magnetic properties of specimens containing dispersed magnetic particles, at low concentrations, containing two distinct size ranges, have been measured. The results have been used to evaluate the effectiveness of several parameters which have been used to discriminate the type of particles in a dispersion. The location of the point representing the properties of a specimen on a graph of $\text{M}{}_{\mathrm{<mtext>RS</mtext>}}\text{M}{}_{\mathrm{<mtext>S</mtext>}}$ and $\text{H}{}_{\mathrm{<mtext>R</mtext>}}\text{H}{}_{\mathrm{<mtext>c</mtext>}}$ indicates a possible particle dispersion which would produce a model with equivalent magnetic properties. The behaviour of dispersions of titomagnetic is also considered and these produce ambiguities in the interpretation of the graph. The possibility of modelling a dispersion which has equivalent properties to specimens from a single lava is considered.