... been involvedin with a similar approach was againonewherethere was asignificantcomponent of private money. That was in the pre-revolution days in Libyawhen Occidental Oil was developing a schemeat Kufra. That scheme was connected with oil; this one is connected with diamonds. When one is 1ooking.for...

..., explosives, thermic boring, diamond drills and saws, bursters and excavator-mounted hydraulic concrete-breakers are described and applications are given. Observed cases of total demolition and cutting of concrete in building alterationsare described. The importance of safe-keeping of as built drawings...

... by diamond methods. Even with both methods of drilling they had had considerable diflicultyin maintaining at all times the necessary degree of straightness and verticality tolerances. He compared the drilling operations a t Steenbras with a project where the drilling operations were basically the same-a dam...

... wascarried out between September and December 1951. The drilling equipment used was a diamond drill consisting of a tube with an outerdiameter of l +inch and an inner diameter of 8 inch. The drill water passes through the wallof the tube and is dis- charged through small holes 1 inch above the cutting edge...