W.c.'s in the main buildings are undesirable, and only required for female teachers. All others should be completely disconnected, and privies should be fully 20 feet away.

Latrines and approaches must be wholly separate for boys and girls. In the case of mixed schools this specially affects planning. Neither should boys and girls use the same passages or corridors. If absolutely unavoidable, complete supervision from classrooms by glass windows must be made.

W.c.'s must be not less than 2 feet 3 inches in width, or more than 3 feet, fully lighted, ventilated, and supplied with doors, which should at least be 3 inches short at bottom and 6 inches at top.

Children must not be obliged to pass in front of a teacher's residence to reach latrines.

The following table gives the approximate number of closets:-

Girls.

Boys.

Infants.

Girls and Infants.

Under

30

children

2

1

2

2

"

50

"

3

2

3

3

"

70

"

4

2

3

4

"

100

"

5

3

4

5

"

150

"

6

3

5

6

"

200

"

8

4

6

7

"

300

"

12

5

8

8

Urinals must be provided in the proportion of 10 feet per 100 boys (also for infant boys). If the numbers in a school are not large, offices common to girls and infants can be provided. A proper proportion of closets must then be of a suitable height for infants.

E.c.'s of approved type may be used in rural districts, but drains for the disposal of surface and slop water are necessary.

Cesspits and privies should only be used where unavoidable, and should be placed at a distance of at least 20 feet from school.

Soil Drains must be outside building (on a hard even bottom of concrete), laid in straight lines of glazed stoneware pipes carefully jointed in cement, absolutely water-tight. A diameter of 4 inches is sufficient unless receiving discharge of more than 10 closets ; then it should be 6 inches. The falls should not be less than 1 in 30 for 4 inch and 1 in 40 for 6-inch drains. Inspection chambers should be provided at each change of direction. Every soil drain must be disconnected from main sewer by properly constructed trap placed on line of drain between latrines and sewer. This drain must be thoroughly ventilated by at least two untrapped openings ; one being the 4-inch soil pipe carried up full size above roof, and the other an inlet pipe connected with side of the trap farthest from public sewer. Automatic flushing tanks are best where trough closets are used.

Waste Pipes from sinks and lavatories should be first trapped inside and then discharged direct through outer wall over trapped gully.