Jean BECQUEREL (1878-1953), physicist, son of Henri Becquerel and collaborator of Paul Langevin, he worked to make General Relativity known. 2 autograph manuscripts; 3 1/2 pages in-fol. and 5 pages in-4, in violet ink. Report on the situation of the Applied Physics Department and the needs of the laboratory. Jean Becquerel complains about the lack of resources: "For several years, I have constantly drawn attention to the lamentable situation in which the Applied Physics Department finds itself. There is no physics laboratory, either in the faculties, or at the Collège de France, or at the École Polytechnique, or at the Conservatoire des Arts et Métiers, which possesses such meagre resources in every respect".... Antoine-César Becquerel... Biographical note on his great-grandfather, the physicist Antoine-César Becquerel (1788-1878), first of the Becquerel dynasty, president of the Académie des Sciences and professor of physics at the Muséum d'Histoire naturelle. Enclosed is a brochure: Éloge biographique de M. Antoine-César Becquerel by J.-A. Barral (1879), with Henri Becquerel's autograph signature on the cover and flyleaf and an autograph annotation.