THE verdict of NATURE on the Rev. O. Fisher's “Physics of the Earth's Crust” is that “One or two points do seem to emerge from this assemblage of calculation as fairly clear and established on tolerably firm foundation. Such as that the contraction of the earth by cooling is inadequate to the production of its greater inequalities.”.. That “there must be subterranean irregularities of density.” I ask for a fresh trial on the ground that the evidence is insufficient.