This “Understanding the Atom” series of semi-technical lecture films is designed for inclusion in a high school senior-level chemistry or physics course, or it could be used as an introductional unit in nuclear science at the college level. The films all have sound and are in black and white. _Alpha, Beta, and Gamma_, 44 minutes, 1962. _Radiation and Matter_, 44 minutes, 1962. _Radiation Detection by Ionization_, 30 minutes, 1962. _Radiation Detection by Scintillation_, 30 minutes, 1963. _Properties of Radiation_, 30 minutes, 1962. _Nuclear Reactions_, 29½ minutes, 1963. _Radiological Safety_, 30 minutes, 1963. FOOTNOTES [1]For more information about these devices, see _Accelerators_, a companion booklet in this Understanding the Atom series. [2]For more information, see _Synthetic Transuranium Elements_, another booklet in this series. [3]The designation ²³⁵U is a new format, now in international usage, for the more familiar style, U²³⁵, to designate isotopes. [4]For more about plutonium, see _Plutonium_, a companion booklet in this series. [5]For more information on reactors, see _Nuclear Reactors_, another booklet in this series. Transcriber’s Notes —Silently corrected a few typos. —Retained publication information from the printed edition: this eBook is public-domain in the country of publication. —In the text versions only, text in italics is delimited by _underscores_.