Part Ii., =excavations.=--Chapter Xx., Hand Excavation or Hand Digging

of Oil Wells. Part III., =Methods of Boring.=--Chapters XXI., Methods of Oil-well Drilling or Boring.--XXII., Boring Oil Wells with the Rope.--XXIII., Drilling with Rigid Rods and a Free-fall--Fabian System.--XXIV., Free-fall Drilling by Steam Power.--XXV., Oil-well Drilling by the Canadian System.--XXVI., Drilling Oil Wells on the Combined System.--XXVII., Comparison between the Combined Fauck System and the Canadian.--XXVIII., The American System of Drilling with the Rope.--XXIX., Hydraulic Boring with the Drill by Hand and Steam Power.--XXX., Rotary Drilling of Oil Wells, Bits, Steel-crowned Tools, Diamond Tools--Hand Power and Steam Power--Hydraulic Sand-pumping.--XXXI., Improvements in and different Systems of Drilling Oil Wells.