Paris: Blanchard, 1922. hardcover. 290 pages. Together with: Juvet's Introduction au Calcul Tensoriel et au Calcul Differentiel Absolu. 101 pages. Tall 8vo, bound in 1/2 green cloth, marbled boards. Paris: Albert Blanchard, 1922. Very good with a newspaper photo of Einstein and Prof. Langevin pasted onto the fly-leaf. very good.