text:  Passing over this however and taking him to assert what the first branch of his argument requires to be asserted that there is no miracle or that there is nothing but the contradiction of a necessary truth such as that three angles of a triangle are equal to two right angles which _may_ not fall within some natural law of which we have not all the data--we cannot see why in the second half of his book he so sedulously endeavours to prove that mesmerism is consistent with experience and may be supported upon similar grounds and accounted for by similar theories to those by which the agency of the imponderable forces is established and accounted for