A splendid system of hospitals was built up by rehabilitation of the hospital system left by the French company and the addition of others. Thousands of cabins were built for the common laborers, the so-called “silver men,” and better cottages for white men who might take their families with them to the Zone while engaged in labor there. Dormitories for single white men were built at every construction point. Restaurants were established at which a meal of four courses was furnished the superior class of white employees at 35 cents. Provision was made for the issuance of cooked rations at a price of 10 cents per ration to the “silver men,” who are nearly all negroes, it being the policy of the commission to protect the life and health of every employee of the Zone, so that the health of the individual would become a guarantee of the safety of the whole body of working men. The Present Low Death Rate Time and experience have conclusively shown Colonel Gorgas’ theories to have been correct, and the gratifying result is that because of the wonderful precautions taken and the very effective work done in scientific sanitization since the commencement of operations under Colonel Gorgas tropical diseases have almost been eliminated on the Zone. As a matter of fact, there has not been a case of yellow fever on the Canal Zone since June, 1906, and the malarial fevers have been reduced to a minimum. The Canal Zone has now a lower death rate than most American cities, and has almost become a health resort. In the opinion of some of the most eminent authorities, the most effective work entering into the entire construction of the canal is the work of sanitization so successfully accomplished by Colonel Gorgas and his able assistants. While the work of sanitization was under way, the President of the United States was taking counsel with a board of engineers as to the type of canal that should be constructed. As usual in all such matters, the authorities were about equally divided, half of the engineers being strongly in favor of a sea-level canal, and the other half advocating what was called a lock canal. The Two Types of Canal The difference between the two types of canal is this: A sea-level canal contemplated an excavation from shore to shore at the level of the sea; a lock canal contemplated the construction of a great dam across the valley of the Chagres and the course of the Chagres river, which dam would have the effect of holding the waters of the Chagres river. The accumulation of those waters in time would form a lake, the surface of which lake, of course, would be considerably above the level of the sea on either side. The dam would necessarily have to be surmounted through the agency of locks.