It's algebraically equivalent to d \ ln ( p / p _ 0 ) / d ( 1 / T ) ( with p _ 0 constant ), which is a valid expression because here you're taking a log of a dimensionless quantity.
12.
Larmor was the first to put Lorentz's 1895-transformation into a form algebraically equivalent to the modern Lorentz transformations, however, he stated that his transformations preserved the form of Maxwell's equations only to second order of \ scriptstyle { v / c }.
