A critical examination and review of this testimony, as presented to the Senate Committee from day to day for nearly five months, including the testimony of administrative officers and others, relating to Panama Canal affairs generally, is not practicable at this stage of the session. Among others, the committee examined Mr. John F. Stevens, chief engineer, upon all the essential points in controversy, regarding which, in the light of additional experience and a very considerable amount of new and more exact information, Mr. Stevens reaffirms his convictions in favor of the practicability and superior advantages of a lock canal. In opposition to the views and conclusions of Mr. Stevens, Prof. William H. Burr pronounced himself emphatically in favor of the sea-level project. As a member of the former Isthmian Commission, reporting upon the type of canal, Mr. Burr had signed the report in favor of the lock project, but as a member of the Board of Consulting Engineers he had sided with the majority favoring the sea-level canal. Thus engineering opinion is as apt as any other human opinion to undergo a change, and the convictions of one year in favor of a proposition may change into opposite convictions, favoring an opposite proposition, only a few years later. Mr. William Barclay Parsons, also a member of the Board of Consulting Engineers, who had signed the report in favor of the sea-level project, gave further evidence before the committee, restating his views and convictions in favor of the sea-level type. Mr. William Noble, an engineer of large experience, for some years in charge of the "Soo" Canal, and who, as a member of the Board of Consulting Engineers, had signed the report in favor of a lock project, restates his views and convictions in favor of a lock canal. Mr. Noble had also been a member of the Isthmian Commission of 1902, reporting at that time in favor of a lock canal. Mr. Frederick P. Stearns, the foremost American authority on earth-dam construction, gave evidence regarding the safety of the proposed dams at Gatun and other points. His views and conclusions are based upon large practical experience and a profound theoretical knowledge of the subject. Mr. Stearns had also been a member of the Consulting Board of Engineers and as such had signed the report of the minority in favor of the lock project. He reaffirmed his views favoring a lock canal with a dam at Gatun. Mr. John F. Wallace, former chief engineer, gave testimony in favor of the sea-level type and strongly opposed the lock project. Col. Oswald H. Ernst, United States Army, than whom probably few are more thoroughly familiar with conditions on the Isthmus and the entire project of canal construction, declared himself to be strongly in favor of the lock-canal project.