60.5 MB (60.0 MB compressed)
4057 x 5211 pixels
34.3 x 44.2 cm ⏐ 13.5 x 17.4 in (300dpi)
ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Polarised light micrograph of crystals of sodium sulphate (Na2SO4). Also known as Glauber's salt. Industrially, sodium sulphate is used in wood pulp production, glass, detergent and chemical manu- facture. Medicinally it may be used as a mild laxative drug. Magnification: x25 at 6x7cm size.
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