OCR Text |
Show Rare Fulgurites on Exhibition. An Interesting and valuable collection collec-tion of fulgurite has recently been mounted and placed on exhibition In the Geological muaoum In Nassau hall. It comprises four specimens of the. rare glassy tubes produced by lightning striking in sand or other loose material which fuses along the path of tho current to form a natural glass. The tubes are frequently quite Irregular in thoir course and often branch, downward. Outside they are rough, more or less ridged and studded with adhering Band grains, while the inside Is quite smooth and glassy frcra the perfect melting of the sand. |