In direct contrast to these are the splendid engines sent to the Isthmus by the commission--200 locomotives, not of the largest, but about of the medium size one sees on the American railways; 2000 splendidly constructed steel dump cars for the hauling of rock and debris; 300 air-compressed drills for boring into the rocks in blasting operations; 125 steam shovels of 75, 90 and 125 tons capacity; apparatus and machinery for the moving of railroad tracks, so effective that a railroad track can be slung 10 or 12 feet to one side or the other, laid down and spiked almost as fast as a man can walk; great steel plows that are pulled across strings of gravel cars, plowing the gravel or debris off the cars on one side so rapidly that a long train of 25 or 30 cars can be unloaded in a few minutes. The stationary machinery is of the best quality that genius and money can construct, and so effective have been these means of labor saving that the work has been accelerated from time to time until it is now a realized fact that the canal will be actually constructed a year and a half ahead of time. When the Canal Commission first began their work after the completion and the adoption of their plans, it was estimated that 110,000,000 cubic yards of debris must be excavated from the canal prism. This debris must be taken and deposited at some place so remote that it could never wash back into the canal by the rains and floods. The debris taken from the cuts on the high lands could not be used in the structure of the Gatun dam, as it would be too liable to percolation. The Gatun Dam The Gatun dam is being constructed by hydraulic process through the instrumentality of suction pumps, which suck up the slime and the debris from the course of the Chagres river and the swamps and morass through which the canal is being constructed. This debris and this water are sucked up and allowed to run along the center of the dam, the water running off and the solid matter congealing there, and by this hydraulic process that great structure will be formed. The traveler upon the Isthmus today, if standing upon an eminence overlooking the cut through Culebra hill, would imagine himself on a height overlooking an industrial city like Pittsburg. There are scenes of such immense activity on every side that he forgets he is in a remote part of the world far from his home, and that he is actually standing upon an eminence in the tropics.