In addition to the work outlined in the above tables a considerable number of buildings were erected for the different divisions and the Panama Railroad Company, and as the necessity for guarding the Canal Zone became evident various barracks and shelters were authorized and constructed. Wire fences were constructed around the locks at Gatun, Pedro Miguel, and Miraflores, the powder magazines at Gamboa and New Culebra, and the substations at Cristobal, Gatun, Miraflores, and Balboa.

Other items of special work performed by the division consisted of additions and alterations to buildings 6, 7, and 9, Balboa shops; alterations to Balboa and Cristobal commissaries; the construction of Young Men's Christian Association buildings at Paraiso and Cristobal; and repairs and alterations to the administration building at Ancon for use as a headquarters' building for United States troops.

In addition to the regular work of the designing forces for The Panama Canal they have been called upon to furnish preliminary plans and estimates for cantonment construction for Army troops and for the proposed permanent posts for mobile troops on the Canal Zone.

The following table gives the comparative unit cost of the principal buildings completed during the past fiscal year:

12, 281.02

40 Type 17-rev. (ordnance) (1), Fort A. 1-story; 1-family. Randolph.

2,056. 70

673.34 26.38

512.83 1,003. 28 1,071. 70 32.88 260.21

154.01 147.20

3, 831. 29 5, 188. 58 576.61 859.41

9,019. 87 1,436. 02

118,064 .0763

23, 197

.0619

DESCRIPTION OF VARIOUS CLASSES OF BUILDINGS.

The following is a description of some of the principal buildings constructed or in the course of construction during the past fiscal year:

SCHOOLS.

Five permanent school buildings have been erected during the past year and will be ready for occupancy the day of the opening of the fall term, October 1, 1917.

The type of construction of all these buildings is reinforced concrete exterior walls, and in most instances the interior walls, the remaining being hollow concrete blocks, cement plastered, and reinforced concrete floor slabs and stairs throughout. Finished floors in classrooms, teachers' rooms, libraries, offices, and assembly room are select narrow yellow pine, on wood sleepers buried in concrete. Finished floors in entrance halls, interior corridors, and libraries are 6-inch square vitreous red tile. The toilet finished floors are vitreous ceramic white-mat tile, and the toilets have also white enameled tile wainscots 5 feet 10 inches high. Stairs have patented safety treads and reinforced concrete newels and handrails, capped with mahogany, and have wrought-iron square balusters. Roofs are red tile, supported on wood framework. The general classrooms in all five schools are 21 feet by 32 feet 6 inches, accommodating 40 pupils, and each room is lighted by three concentrated window openings, each 6 feet 5 inches by 8 feet 2 inches, which admit light over the pupil's left shoulder. Contrary to the usual custom on the Isthmus, hinged sash were not installed, but the northern practice of using vertical sliding sash was employed, this being necessary to allow the use of interior shades for protection from the sun, which would flood the room through such large openings concentrated in one wall. For ventilation small, high windows are generally placed in the opposite wall, opening on a corridor. The schools are not screened, as it is not proposed to use them at night.

All the schools are fully equipped with modern toilet fixtures and marble stalls, and each classroom with bookcases, wardrobes, umbrella racks, and slate blackboards. Each schools has a belfry and bellbubbling water supply cooled from a central plant, fire line and hose, fire-alarm system, call gong, telephone period ringing system, and semi-indirect illumination. Walls and ceilings will be painted in light warm tints. Following is a description of the five buildings: Balboa School. The building is 117 feet 8 inches by 151 feet 4 inches, three stories high, hollow-square plan, contains 25 standard classrooms, 1 high-school assembly room 32 feet 7 inches by 73 feet 4 inches, 1 laboratory, 3 libaries, 1 supervisor's room, 2 principals' rooms, 2 teachers' rooms, 11 toilets, 3 jaintors' rooms, 5 storage rooms, 1 lunch shelter 29 feet 9 inches by 73 feet 4 inches, 1 dry room, 1 bathroom, and 2 closets; a total of 59 rooms, besides an interior patio 57 feet 4 inches by 64 feet 10 inches, surrounded by a three-story porch averaging 9 feet wide, and an entrance loggia 12 feet 3 inches by 74 feet 8 inches, and four staircases.

This building occupies a nearly level site under the Administration Building, and has frontage on three streets. The site is a fill and the building rests on a solid mat of reinforced concrete.

The features of the building are the entrance loggia and the three-story arcaded patio, grass planted, upon which all the rooms open. This building has a flagpole in front, and an octagonal open belfry of stucco and tile roof tops the highest level of the roof in the rear of the building. This building accommodates all grades from primary and intermediate (first and second floors) to high school (third floor).

Cristobal School. The building is 56 feet by 166 feet 8 inches, two stories, rectangular plan, contains 15 classrooms, 1 study room 21 feet by 42 feet, 1 laboratory, 1 principal's room, 1 teacher's room, 1 library, 1 lunch room, 6 toilets, 2 janitors' closets, 6 storage closets, and 1 dry closet; a total of 36 rooms, besides a two-story front porch 9 feet 4 inches by 40 feet, an entrance lobby, and an 11-foot wide central corridor running the length of the building, with stairs and secondary entrances at each end.

This school is located on Colon Peach adjacent to the Colon Hospital, where it is convenient for scholars from the New Cristobal town site. The feature of the building is a front entrance portico of four poured concrete columns 24 feet 6 inches high. The building is crowned by a stucco and copper belfry. This school is equipped to accommodate all grades from primary to high school.

Ancon School. The building is 75 feet 8 inches by 144 feet 10 inches, over-all dimensions, two stories, H-shaped plan, contains 11 classrooms, 1 library, 1

teacher's room, 1 lunch room, 5 toilets, 2 janitors' closets, and 2 storage closets; a total of 23 rooms, besides a vestibule and hall, and a 9-foot 3-inch wide two-story porch running the length of the building, with stair and secondary entrances at each end.

This school is situated well back on a terrace facing the Ancon Plaza. The feature of the building is a two-story arcade, which faces the important street at the back of the school. The building has a square stuccoed open belfry with copper roof.

Pedro Miguel School.-The building is 67 feet by 140 feet 8 inches, over-all dimensions, one-story, U-shaped plan, contains 5 classrooms, 1 teacher's room, 4 toilets, 1 janitor's closet, and 1 storeroom, a total of 12 rooms, besides 208 linear feet of 10-foot wide porch.

This school is located on the top of a small hill not far from Pedro Miguel railway station. It has entrances in the Spanish style and an open square belfry with red tile roof.

Gatun School. This school is a duplicate of the Pedro Miguel School and is similarly situated on a commanding site at Gatun.

BALBOA SANITARY AND DENTAL BUILDING.

This building, 32 feet 6 inches by 62 feet, is located on the Prado opposite the Balboa dispensary; it is constructed of reinforced concrete resting on a reinforced concrete mat. The roof is red Spanish tile.

The first floor has been designed for the housing of the district dentist and the district sanitary inspector. The dental suite consists of a waiting room for patients, an operating room, a dentist's laboratory, and a ladies' rest room. For the sanitary inspector a workroom and an office have been provided. The building contains also two rooms, to be used for consultation and examination, in conjunction with the dispensary across the Prado.

On the second floor are located the living apartments of the sanitary inspector and a mess and kitchen for the bachelor doctors of the district dispensary.

PEDRO MIGUEL DISPENSARY.

Two stories, 76 feet 4 inches by 36 feet 10 inches. It contains, besides the drug and doctors' rooms of the dispensary, rooms for the district dentist and the district sanitary officer, and on the second story married quarters.

The building is of poured concrete exterior walls and floor slabs, with red tile floors on the first floor; concrete block partitions, wooden floors on the second floor, and a Spanish red tile roof.

BALBOA ELECTRICAL STOREHOUSE.

The building is 62 feet by 164 feet, three stories, averaging 14 feet from floor to floor. It is planned to house all general electrical supplies requisitioned on the Isthmus and is located under Sosa Hill, adjacent to the Balboa substation, and facing the Administration Building. The interior is unbroken by partitions except the office, dry room, tool room, and toilets on the ground floor, and a workshop on the second floor. The stair and elevator shaft carry up in the center of the large rooms, the latter being 8 feet 6 inches by 13 feet. Floors, exterior walls, and columns (in two lower stories only) are reinforced concrete. The roof has steel trusses and purlins, wood rafters, and sheathing bearing Spanish red tile. On the ground floor rolling steel shutters open onto a railroad platform and spur in the rear of the building, and make convenient the use of road vehicles in front.

PERICO ISLAND BARRACKS.

This building is 55 feet 6 inches by 167 feet 6 inches, and has a kitchen and toilet wing 26 feet by 44 feet, all two stories high, with an unglazed green Spanish tile roof. The structure is a subbarracks of the Coast Artillery, and is built on a restricted area between the beach and railroad track. The first floor level is 4 feet above maximum high tide, and a fill was necessary to keep water from under the building. The rear half of the building rests on rock, which falls away so rapidly that it was necessary to support the seaward half with piling.

The exterior walls, stairs, beams, and columns throughout are of reinforced concrete. Interior partitions are wood. The floors are wood, on wood joists,