...very fluid state. Prom the fragmenta of these stones exodes a kind of pitch, or indurated petroleum, which readily melts with heat, and when ignited burns with a crackling Boise, and emits a strong bituminous ыпеП. The same bed contains numerous nodules of what we may...

...have prevailed. We have existing evidence of ibis. Dr. Young, in the work already quoted, says: — "In the cavities of nodules containing petrifactions,...black, and at last hardens into a kind of pitch, which generally melts with heat, and when ignited burns with a crackling noise, and emits a strong bituminous...