rankine apparently regarded energy, as we do today, as being classified into two kinds, viz., kinetic and potential, and his thermodynamic theory was developed by considering the transformation of one into the other.

This is all lower case. Can you fix that?
Rankine apparently regarded energy, as we do today, as being classified into two kinds, viz., kinetic and potential, and his thermodynamic theory was developed by considering the transformation of one into the other.