Popular Science Monthly 



493 



I American Press Association 



The thousands of tons of earth and rock precipitated into the Panama Canal had to be re- 

 moved before shipping could pass through the canal. Two dredges and the ship "Newton" 

 were caught at this point. It took seventy-nine days to dig the '"Newton" out 



suming that a channel through the ob- 

 structed area can be maintained." 



Seven dredges have been more or less 

 steadily working at the bases of the 

 Culebra slides for the last few months. 

 Three of these are fifteen-yard dipper- 

 dredges, one is a five-yard dipper- 

 dredge, one a ladder - dredge and the 

 others are sea-going suction and pipe- 

 line suction-dredges. 



The two photographs appearing on 

 these pages show the lifteen-yard dipper- 



dredge Cascadas at work. This is the 

 largest all-steel dredge in the world. It 

 was made in Germany especially for use 

 in the canal and was shipped in parts to 

 the Zone. The dredge is one hundred 

 and forty-four feet long. The bucket 

 shown in the picture lifts fifteen wagon- 

 loads of material at a time. In a single 

 day fourteen thousand cubic >ards — in 

 other words as many wagon-loads — can be 

 removed, although a record of seventeen 

 thous uid cubic vards has been made. 



The May Popular Science Monthly will be on sale Saturday, April fifteenth 

 (West of the Rockies, Saturday, April twenty-secondj. 



