Editore: Macmillan & Co., London, 1922
Da: JF Ptak Science Books, Hendersonville, NC, U.S.A.
Soft cover. Condizione: Very Good. Joly's letter to the editor appears on p 112 in this weekly issue of 22 July 1922, Nature, vol 110, # 2751. Bragg's article appears on pp 116-117. Offered with the front wrapper, with the small oval ownership stamp of the Smithsonian Institution Astrophysical Observatory, removed intact and cleanly from a larger bound volume.