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274
1911]
houses is checked. It would be true economy to do so, for the value of soot,
as a manure, owing to the nitrogen it contains, may be taken at about
£2.10s. per ton. On this basis the value of the soot, deposited in London
annually is worth £190,125, which is entirely lost as a heat factor owing to
the imperfect combustion of the ordinary firegrates and even factory flues.
SYNOPSIS OF THE DISTRICT INSPECTORS' SANITARY
WORK FROM 1891 to 1911 (21 years).
Houses inspected and visited - 1,243,122
Drains Constructed 20,714
„ Improved and repaired 18,618
„ Traps fixed 101,154
Water closets, pan, trap, etc., furnished 21,664
„ Pan and trap only, furnished 20,642
„ Water only, furnished 8,987
Soil pipe, defective, renewed or remedied 4,117
„ Insufficiently ventilated, fully ventilated 3,555
„ Unventilated, ventilation supplied 5,973
Dust Bins, Provided 18,727
„ Repaired 4,003
Surface drainage, Constructed 11,977
,, Relaid 24,566
Water supply, new cisterns provided 4,327
„ Cisterns repaired and cleansed 12,264
„ New supply 8,008
Houses generally Repaired 10,897
„ Cleansed 19,952
„ Ventilated 13,562
Other Improvements 141.570
Total Improvements 475,277