History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c12.s1.t4.27
History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c12.s1.t4.27
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v1.c12.s1.t4.27
“Timbering of working places was understood and balks of babul (accasia arabica) were discovered. When the old workings at Hutti were first pierced at about 500 ft (152.4 m) an explosion of gas occurred, probably due to sudden release of pressure on the accumulated gases by old rotting timber.