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23
supply of parts of the apparatus have meant that installation
will not be effected until early in 1958.
The two tables here are intended to indicate the
inverse relationship between temperature and pollution levels.
Table 1 shows the expected drop in pollution with the rise in
temperature during the summer months. It also indicates that
the relative variation of SO2 is less than that for smoke
(i.e., the suspended soot, etc.) in the atmosphere. Inasmuch
as it is known that SO2 emission is directly proportional to
the amount of fuel consumed, irrespective of the type of
appliance on which it is burned, the relative increase of smoke,
as compared with SO2, during the winter months would seem to
be attributable to domestic open fireplaces which are used only
in the winter months.