49.4 MB (49.0 MB compressed)
5090 x 3390 pixels
43.2 x 28.7 cm ⏐ 17.0 x 11.3 in (300dpi)
SIDNEY MOULDS / SCIENCE PHOTO LIBRARY SIDNEY MOULDS / SCIENCE PHOTO LIBRARY
Polarised light micrograph of crystals of naphthalene, a white, crystalline hydrocarbon with a characteristic penetrating odour. It is used as a moth repellant in the form of moth balls or flakes. It is also found in the manufacture of acids & compounds used in the dye industries & in the production of synthetic resins & celluloids. Naphthalene is also the single most abundant constituent of coal tar. Magnification: x60 at 35mm size.
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