Subject
- Chemistry--Study and teaching1
- College presidents1
- Color blindness1
- Color photography1
- Color printing1
- Color--Study and teaching1
- Colorimetry1
- Coloring matter1
- Copperplates1
- Diffraction1
- Dow Chemical Company1
- Dyes and dyeing--Textile fibers1
- Electrochemistry1
- Electromagnetic waves1
- Electronic excitation1
- Employee fringe benefits1
- Franklin Institute (Philadelphia, Pa.)1
- Home economics1
- Hurst, George H. (George Henry)1
- Industrial arts1