The Physical Review, Volume 94, Second Series Number 1, April 1 1954, published for the American Physical Society, by the Institute of Physics, Library stamp to title-page , faux half calf, spine with small split , boards with blue marbling, bookblock firmly attached. Internally fine and clean, containing First Editions of R. P. Feynman paper, Atomic theory of the two-fluid model of liquid helium [p.262 - p.277], the paper which document Feynman's solution of the problem of superfluidity in liquid helium-4, H. Y. Carr, and E. M. Purcel's paper Effects on diffusion on free precession in nuclear magnetic resonance experiments [p.630 - p.638], a pioneering paper in magnetic resonance imaging , R. H. Dalitz's ' paper, Decay of mesons of known charge[p.1046 - p.1051], a major breakthrough in 20th-century particle physics.