German Scioptric Ball Microscope (circa 1700s)


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Sodium Barbital Movies

Sodium Barbital Video No. 1 - Sodium barbital crystallization is observed under polarized light illumination at a magnification of 20x in this video. Playing time is 9.1 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 (3.81 MB).

Sodium Barbital Video No. 2 - Sodium barbital crystallization is observed under polarized light illumination at a magnification of 10x in this video. Playing time is 9.1 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 (3.81 MB).

Sodium Barbital Video No. 3 - Sodium barbital crystallization is observed under polarized light illumination at a magnification of 10x in this video. Playing time is 13.7 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 (5.70 MB).

Sodium Barbital Video No. 4 - Sodium barbital dissolution is observed under polarized light illumination at a magnification of 20x in this video. Playing time is 17.0 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 (7.08 MB).

Sodium barbital is a short-acting barbiturate used intravenously to induce unconsciousness in patients about to undergo surgery. Gaseous anesthetics are then administered to maintain the unconscious state.

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