Panama and the canal . Men at Work Drilling Holes for the Cuarges. away from it like an enormously long tail. Upon inquiry,we shall find that each dredge has large suction pipes thatextend downward to the soft muddy bottom. This israpidly sucked up through the pipes and then forced out BLASTING through the long tube and deposited wherever it is desired.When the bottom is too hard for the suction pipes to drawup, it is often loosened by charges of dynamite. This. Loading Drill Holes with Dynamite. method of digging by dredges costs only about eleven centsper cubic yard. As fast as a dredge cuts
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Panama and the canal . Men at Work Drilling Holes for the Cuarges. away from it like an enormously long tail. Upon inquiry, we shall find that each dredge has large suction pipes thatextend downward to the soft muddy bottom. This israpidly sucked up through the pipes and then forced out BLASTING through the long tube and deposited wherever it is desired.When the bottom is too hard for the suction pipes to drawup, it is often loosened by charges of dynamite. This. Loading Drill Holes with Dynamite. method of digging by dredges costs only about eleven centsper cubic yard. As fast as a dredge cuts out the channelit is floated along from place to place. In very hard soilor rock, a dredge is of no value.Another interesting feature of the work is the blasting.It would be safe to say that without power-ful explosives the canal could not be built.D}Tiamite is the chief one used. In the year 1908, 8, 850, 000 Blasting DRILLING 199 pounds were shipped from the United States and used in theCanal Zone. All along the portions of the canal that extend throughrock and hard soil, we can see the men at work drillingthe holes for the charges. Some are made only 3 or 4feet deep, others are 10 or 20 times that depth. ThesedriUs are about the noisiest machines on the canal. Theclatter of a half dozen of them is almost deafenine. They