Ladd\'s Student Microscope (circa 1864)


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Moth Balls Movies

Moth Balls Video No. 1 - Moth balls sublimation is observed under polarized light illumination at a magnification of 10x in this video. Playing time is 9.8 seconds. Choose a playback format that matches your connection speed: 28.8k (modem), 56.6k (modem), or T1/Cable/DSL, or download this video clip in MPEG format (4.12 MB).

Moth Balls Video No. 2 - Moth balls crystallization is observed under polarized light illumination at a magnification of 20x in this video. Playing time is 10.9 seconds. Choose a playback format that matches your connection speed: 28.8k (modem), 56.6k (modem), or T1/Cable/DSL, or download this video clip in MPEG format (4.53 MB).

Moth Balls Video No. 3 - Moth balls sublimation is observed under polarized light illumination at a magnification of 10x in this video. Playing time is 9.6 seconds. Choose a playback format that matches your connection speed: 28.8k (modem), 56.6k (modem), or T1/Cable/DSL, or download this video clip in MPEG format (4.12 MB).

Moth Balls Video No. 4 - Moth balls sublimation is observed under polarized light illumination at a magnification of 10x in this video. Playing time is 9.8 seconds. Choose a playback format that matches your connection speed: 28.8k (modem), 56.6k (modem), or T1/Cable/DSL, or download this video clip in MPEG format (4.11 MB).

Moth Balls Video No. 5 - Moth balls crystallization is observed under polarized light illumination at a magnification of 20x in this video. Playing time is 9.8 seconds. Choose a playback format that matches your connection speed: 28.8k (modem), 56.6k (modem), or T1/Cable/DSL, or download this video clip in MPEG format (4.12 MB).

Moth Balls (Naphthalene) is an aromatic hydrocarbon that contains two benzene rings fused together between two adjacent carbon atoms. At room temperature, naphthalene is a white crystalline solid with a very high vapor pressure. The principal source for naphthalene is coal tar, and the chemical is used as a precursor to other organic chemicals including plastics, dyes, and solvents.

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