Albert Einstein “is endeavoring now to formulate a set of universal laws that will encompass both the boundless gravitational and electromagnetic fields of interstellar space and the tiny, terrible field inside the atom. In this vast cosmic picture the abyss between macrocosmos and microcosmos—the very big and the very little—will be bridged, and the whole complex of the universe will resolve into a homogeneous fabric in which matter and energy are indistinguishable and all forms of motion from the slow wheeling of the galaxies to the wild flight of electrons become simply changes in the structure and concentration of the primordial field...” -Lincoln Barnett
INSCRIBED BY EINSTEIN on front free endpaper in German: “Dir dies zu senden hätt ich nicht gewagt, nun thu ich's doch, weil's die Weibsen gesagt. Herzliche grüsse”; English translation: “To send you this I wouldn't have dared / if the wife hadn't so declared / Best wishes / from / Albert Einstein. 49”. First edition, fourth printing. With Foreword written by Einstein.
“Lincoln Barnett's book represents a valuable contribution to popular scientific writing. The main ideas of the theory of relativity are extremely well presented. Moreover, the present state of our knowledge in physics is aptly characterized. The author shows how the growth of our factual knowledge, together with the striving for a unified theoretical conception comprising all empirical data, has led to the present situation which is characterized—notwithstanding all successes—by an uncertainty concerning the choice of the basic theoretical concepts” (Albert Einstein, from the Foreword).
New York: William Sloane Associates, 1949. Octavo, original cloth, original dust jacket. Very light wear to dust jacket, otherwise fine. A rare signed copy with wonderful Einstein inscription.