2. Existence around or close to the plain of dry lands, provided with good and abundant water, which serve for agriculture and cattle raising and of sufficient area for the founding of an agricultural community of at least 100 families. 3. Facility for the establishment of rapid communication with a fluvial port, or one that must serve them. Art. 35. Each hospital shall have a capacity for 100 sick persons. Art. 36. Each hospital shall possess the following installations: (a) Five separate pavilions, each for 20 sick, each sick person having 5 cubic metres and an area of 12 square metres. One of the pavilions should be installed with the necessary requisites for the isolation of infectious diseases; for this purpose it should be divided into rooms for isolation, independent and easily disinfected, with the proper sanitary apparatus. All the hospital buildings should have the windows protected by wire screening whose openings should never exceed 1½ millimeter and the doors provided with: (b) A disinfectory provided with an apparatus to disinfect in boiling lye and a stove for sterilization by the combined action of heat, vacuum and formal. Annexed to the disinfectory shall be the laundry. (c) A laboratory for the diagnostic clinics and microbiology. (d) Surgical operating room. (e) Clinic consulting room. (f) Room for autopsies. (g) Pharmacy. (h) Sanitary installation, in which should terminate all the drainage pipes of the hospital, destined for the bacteriological treatment of the water used, which not until after this operation must be allowed to flow into the natural river courses. (i) Dependencies for the administration and quarters of the personnel. Art. 37. In each hospital there shall be made in the respective pharmaceutical laboratory a preliminary study of all the remedies used by the people of that region to determine which are prejudicial and which inoffensive. The respective Director shall show the people in printed circulars, frequently and profusely distributed that their use is improper. Those which are found efficacious and susceptible of improvement, shall be sent for more complete studies in the chemical laboratories and federal pharmacies, letting the people know the results obtained. Art. 38. When the installation of each hospital is complete, a contract shall be made, by public bidding, or independent of it, as the Government may think best, with some professional of recognized ability, the direction and maintenance of the respective services, the contract including the following obligations: 1. The reservation of one hour daily in the medical consultation room, where the sick known to be without means may freely receive examination and be furnished with the necessary medicines. 2. The maintenance of a bureau for vaccination against smallpox and other contagious diseases by means considered efficacious, and to attend gratuitously to all who may wish it.