Physikalske-Grublerier eller de forste Tings Philosophie af Fornuftslutninger og Erfaringsgrunde.

432, [4] pp. Danish text. Half-leather with brown morocco spine label, gilt titles and rules, marbled paper over boards. Engraved title page. A philosophical work focusing on first principles (the title translates as Physical Ponderings or the Philosophy of First Things of Reasons and Experiences). While the concept of first principles is ancient, Rene Descartes was particularly important in developing a system of a priori knowledge from which to approach other philosophical questions with logical consistency and a mathematical exactitude.