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64 I. PHYSICAL GEOGRAPHY.
Mean Temperature for each day in the year. Celsius.
reduced^ to sea-level. Of two stations, one in the interior of the country and
the other on the east coast, the two lying in the same latitude, the former, as
we can see by Table 6, has a colder winter and autumn but a warmer spring
and a somewhat warmer summer than the latter. Only Storlien and Östersund
have a warmer winter and autumn, and Storlien a cooler summer than a
corresponding station on the east coast, this being the result of the influence of the
Atlantic and the winds from that ocean. A good idea is obtained of the
yearly variations of the temperature by studying the curves in the accompanying
diagram, which give the mean temperatures for every day of the year for the
50-years’ period 1849 — 98, at Lund, Stockholm and Haparanda, and, for the
sake of comparison, in London, too, as well as in New York for the 44-years’
period 1869—1912. It is seen that July is everywhere the warmest month, while
at the three Swedish stations it is February, but in London and New York,
January is the coldest. During February, the temperature at Haparanda is as
much as 16° lower than it is in London, while the difference during July
amounts to only 3°. Stockholm, in February, is 8° colder than London, while
the mean temperatures of the two cities for the month of July are 16’9° and
17’9° respectively. Thus we see that the summer of Sweden, a country lying
far to the north, although short, is not much inferior to that of the South of
England, as regards temperature. This fully explains why it is possible, in
Sweden, to carry on agriculture successfully north of the Arctic Circle, even
where the mean temperature of the year is below freezing point. As to New
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