422 



THE POPULAR SCIENCE MONTHLY 



Typical Ckoss Section adotted by the Boakd of Consulting Engineers foe 



THE Culebra Cut. K. 54.41. 



length of 1,000 feet, but with intermediate gates to conserve time and 

 water. The committee called attention to the increasing difficulties of 

 constructing a dam at or near Bohio, disclosed by additional borings, 

 and condemned as impracticable a dam at Gatun where borings to 172 

 and to 139 feet below sea-level did not reach bed-rock. 



The data, which the commission had instructed the committee to 

 bring to Washington, were not submitted with the report, neither did 

 such data accompany a progress report of the chief engineer, Mr. John 

 F. Wallace, which was received a few weeks later. The ty})e of canal 

 was, however, quite fully discussed by Mr. Wallace, and his report con- 

 tained the recommendation 



that no temporary or tentative plan be adopted that will interfere with the 

 final adoption of the " sea-level plan," which it is hoped will ultimately receive 

 the favorable consideration of the commission. 



The committee report, however, brought before the commission a 

 definite recommendation, relating to the type of the canal. In the 



EN&. 

 NEWS. 



Total Amount of Excava+^on required May 1, 1904: 

 1«,000',000 Cubic Yards. 



~ Fig. 1. Progress of Excavation on 

 the Panajia Canal inder the United 

 States, as Compared with Total Ex- 

 cavation Required. 



ENS- 

 NEWS. 



Total Estimated Excavation ,-'mcMing 

 French,- 132,000, 000 Cu. Yds. 



Fig. Li. I)LU;l!A.M showing ItULATIOX 



OF French and American Excavation 

 on P.\nama Canal to Total Estimated 

 Ajiount. 



