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113
Scries C— Winterbourne Road Girls' School.
Recognised accommodation. 60 girls.
Ventilation—
Windows closed.
Hoppers open 3,892 sq. inches (average).
Special inlet open 104 sq. inches.
Special outlet open 104 sq. inches.
Months.—November, December, and January.
Number of observations, 10.
Average number of occupants, 55 children and one adult.
Average temperature. Dry bulb, 57.7 deg.Highest 62 deg.
Lowest 54 deg.
Wet bulb, 52.9 deg.
Average C.O2 parts per 10,000, 11.5. External air, 3.7.
Number of occasions below 9 parts per 10,000 2
do. between 9 and 12 parts per 10,000 7
do. above 12 parts per 10,000 1
Total observations 10
Best Results.—On December 8th at 4 o'clock, that is 35 minutes
after the interval. A still, wet day. Outdoor temperature 50 deg. F.
The C.O2 was 8.5 parts per 10,000 with 59 children and 1 adult
present.
October 22nd.—Eight westerly breeze. Temperature outdoors
49 deg. F. At 4.5 o'clock with 33 children and 1 adult present the
C.O2 was 8 parts per 10,000.
Worst Results.—November 5th, 3.20 p.m., that is one hour and
20 minutes after occupancy. A still day. Outdoor temperature 50
deg. F. The C.O2 was 25 with 49 children and 1 adult present. This
was very exceptional and difficult to account for, and none of the other
examinations approached this, the next worst being November 5th.
3.15 (in another room) C.O2 being 12 parts per 10,000, with 53 children
and 1 adult present.
During these observations the windows were closed, but the hoppers
and special inlets and outlets remained open.