[en] The author proposes a rather brief overview of practical applications of artificial radio-elements in various industrial sectors. These applications concern the field of control through non destructive tests (gamma radiography analyses, absorption-based and backscattering-based thickness gauges) or measurements (flow rate or level measurements), various researches (regarding wear, fabrication of chemical products, mixtures, the origin of sulphur in cokes, or the action ammonium thiosulfate on the gloss of silver electrolytic deposit). Reprint of a paper published in 'Electronique Industrielle, No. 5, Nov-Dec 1955

[en] This publication gathers several articles which address various aspects of atomic piles and radio-isotopes. More particularly, the addressed topics are: the future of atomic energy; a presentation of the Nuclear Study Centre of Saclay; an introduction to nuclear engineering; a study of the interaction of neutrons with various elements as a function of neutron velocity; a determination of the transport mean free path of thermal neutrons by measuring a complex length of diffusion; the electronic equipment used in the measurement of the diffusion length in graphite; the non destructive test of materials using the oscillation method in the Chatillon pile; an analogue harmonic analyser; recent progress in reactor control; analogue calculators pile simulators; the preparation of artificial radio-elements; the preparation of artificial radio-elements; a general review of radioactive survey equipment; radioactive aerosols and gases in the atomic industry; A fixed health monitoring installation at the High Activity Laboratory of Saclay. Reprint of a dossier published in 'L'Onde Electrique', Vol. XXXV, No. 343, October 1955, p. 783-947