It gives a wonderfully clear and complete account of a modern theory which, although it already had a literature of its own on the Continent, had, at the time when the book was published, attracted little or no attention in this country.
Ito ay nagbibigay ng isang kamangha-mangha malinaw at kumpleto na account ng isang makabagong teorya na kung saan, kahit na ito ay nagkaroon na ng literatura ng sariling sa Kontinente, had, at ang oras na kapag ang libro ay nai-publish na, attracted kaunti o walang pansin sa bansang ito.