THE method described in this letter was devised in collaboration with Dr. R. G. Koopmans of Utrecht. A flat surface must first of all be cut or ground on the coal ball or other petrified mass parallel ...

PLANT tissue can be petrified by impregnation with natural waters with a high concentration of dissolved silicate1. This occurs commonly in springs issuing from volcanic deposits in New Zealand, ...

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Gingold Theatrical Group's PROJECT SHAW presents two short comedies by George Bernard Shaw - PASSION POISON AND PETRIFACTION and PRESS CUTTINGS -- on Monday, November 21 at 7pm at The Players Club (16 ...

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TRANSFORMATION of living tissues into crystalline salts (petrifaction§) has interested man from the earliest times. The recorded fate of "Lot's wife" is certainly a classic example. The purpose of ...

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