Transactions . froc* I UjEJW-42. Voi TXXPi ite . MTJ. G franstm^spaper ftr? Deep Boring Mttchznes* Fig. 2. Sketch of Drill bit used at Uie/ <oWest Hartlepool Water Works. 1!, square•Iron i _J1 X /j, rounds Steel/. round Scale _4 Feet to 1 Inch . VolJOOCPlatelXEPK. 7b zZtustrafc J/^Y/Y/w/.^/wM?||/w/w, O/t DeepJSoringJMackm&s. Front Elevation of the machine USED BY THE WEST HARTLEPOOLGAS AND WATER COMPANY. Scale _ 4< Feel to 1 Inch.

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Keywords: ., bookcentury1800, booksubjectmechan, booksubjectmineralindustries