Paris: Centre National De La Recherche Scientifique (CNRS) 1950. First Edition. XII, 408 pages. Original cloth boards with black and red stamped titles. Corners lightly bumped, minor soiling to boards. A nice copy. Light browning to internal paper as usual. Includes a card laid in from Perrin's son Francis: "Hommage du Centre National De La Recherche Scientifique et du Professeur Francis PERRIN", also near fine with one corner bumped at edge. Francis Perrin taught at Columbia University after he emigrated to the US from France in the 1940s. Near Fine. Cloth. 
Jean Perrin was awarded the Nobel Prize in Physics in 1926 for "for his work on the discontinuous structure of matter, and especially for his discovery of sedimentation equilibrium." This book collects a large portion of his works.
See DSB (Vol X: pp 524-6) for more information on Perrin, who is perhaps best known for experimentally confirming Einstein's theory explaining Brownian motion.