Flow out of 
Bourne cul- 
vert less than 
Bourne flow. 
Leakage into 
Sewers. 
Bourne of 
1882, 
Bourne of 
1883. 
Bourne of 
1887, 
40 
being 1:18 cubic feet per minute. On the 25th Decem- 
ber, 1880, the flow out of the Bourne culvert at 
Croydon was 202'1 cubic feet per minute, and on the 
24th March, 1881, it was 515-2 cubic feet per minute. 
It will be observed that in this year for the first time 
the quantity of water flowing out of the Bourne culvert 
at Croydon at the maximum period of flow was con- 
siderably less than the surface flow in the Caterham 
Valley below the “‘ Rose and Crown” at Coulsdon, and 
in this year there was a considerable volume of water 
which found its way into the new sewers in Brighton 
Road which had lately been constructed by the Croy- 
don authorities. 
In 1882 the Bourne rose on the 12th of January 
below the ‘‘ Rose and Crown,” Coulsdon, and on the 
16th January it was flowing at the rate of 3°34 cubic 
feet per minute, and increased to 113°8 cubic feet per 
minute on the 28th c. february, and ceased to flow on 
the 4th May. ‘The largest flow out of the Bourne 
culvert was on the 3rd a when it was 1429 cubic 
feet per minute. 
In 1883 the Bourne rose on the 12th of January in 
the Bourne channel below the ‘‘ Rose and Crown” at 
Coulsdon, and on the 14th January it was flowing at 
the rate of 5:1 cubic feet per minute. Onthe 7th March 
it was at its maximum and flowing at the rate of 738-4 
cubic feet per minute, and it ceased to flow on the 11th 
of June of that year. On the 7th March the volume 
flowing from the Bourne culvert at Croydon was 579-0 
cubic feet per minute. 
The next Bourne occurred in the year 1887, when 
it rose in the Bourne channel below the ‘ Rose and 
Crown ” at Coulsdon, and on the 17th of February it 
was flowing at the rate of 39 cubic feet per minute, 
