Title: Microscopic view of the new and old sari cloths
Images: (1) new sari cloth micrograph (2) old sari cloth micrograph
Caption: An old sari cloth, available even in the poorest household, can be folded eight to ten times. This creates a 20-micron mesh filter, as we determined by electron microscopy.
The pictures show why old sari cloth, not new, is preferred—because its holes are smaller. Recent studies in Bangladesh show that sari filtering reduced cholera in villages by more than 50%.
Source: Dr. Rita Colwell, Director of The National Science Foundation
NSF funded: No
NSF Permitted Use: yes
NOTE: Dr. Colwell's personal research material, if for other than her speeches...ASK PERMISSION.
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