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Subject
- Geo. Borgfeldt & Company1
- Harmonic Reed Corporation1
- Lionel Corporation1
- Magic1
- Magic shows1
- Magic tricks--Equipment and supplies1
- Microscopes2
- Midgetlab Company1
- Pasteur, Louis, 1822-18951
- Porter Chemical Company6
- Science--Experiments2
- Science--Study and teaching2
- Skil-Craft Corporation5
- Smithsonian Institution2
- Telegraph1
- Toys5