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Abstract
A new method has been found useful in studying pyritized plant petrifactions under transmitted light. Basically, it is a peel technique but involving embedding of the specimen in paraffin wax of high melting point after slow, progressive infiltration by wax solutions in xylene, and treating the desired clean, smooth surface with concentrated nitric acid, the time depending on the quality of the material, and washing away the acid with ethyl alcohol. Peeled sections with cellulose acetate sheet are then prepared in the usual way. Series of sections of pyritized petrifactions can be prepared this way within a short time and when not working, the specimen is stored safely for days by completely covering it with wax to inhibit the pyrite degradation. Advantages of this technique over the known ones are discussed.
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