1. Journ. Chem. Soc. London 1867 117
2. LXXVI.—On the lowering of the freezing points of cadmium, bismuth, and lead when alloyed with other metals
3. \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm Pb} = 100 \cdot \frac{{\frac{{p{\rm Pb}}}{{{\rm 206}{\rm .9}}}}}{{\frac{{p{\rm Pb}}}{{{\rm 206}{\rm .9}}} + \frac{{p{\rm Mg}}}{{{\rm 24}{\rm .36}}}}}, $\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm Mg} = 100 \cdot \frac{{\frac{{p{\rm Mg}}}{{{\rm 24}{\rm .36}}}}}{{\frac{{p{\rm Mg}}}{{{\rm 24}{\rm .36}}} + \frac{{p{\rm Pb}}}{{{\rm 206}{\rm .9}}}}}, $\end{document} p p