Excerpt:
Materials for Polariscope
1. Polarizing material
Best: Polaroid HN Film, Laboratory, 611 x 6”. Available from Fisher Scientific Company, 585 Alpha Drive, Pittsburgh, Pa. 15283, Fisher Cat. No. l3-789A. Cost approx. $7.50 per sheet.
Adequate: Polarizing material, Selected Seconds. Cat. No. P-70,887: 6” x 24” sheet for approx. $4.80, Edmund Scientific Company.
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