wae eeett
4
Ann. Acad. Scient. Fennicze
A.ITI.
101
Fig. ?. Annual rainfall in Finland in mm, mean in years 1886—1935, acc. to V. V.
KORHONEN (21),
on possible variations in theSr content of milk and grass in different parts
of Finland and on the general level of Sr in the milk of the region of highest
milk production at the end of the summer season 1959.
Regarding the annualrainfall no great local variations exist in Finland
(Fig. 1). Nearly all the milk is produced in areas where the annual rainfall
is between 500 and 700 mm (Fig. 2). More than half the total milk produc-
tion takes place south of the line Savonlinna-Jyvaskyla-Vaasa.
The general level of *Sr in the milk in this area was studied by taking
representative skim milk samples (Table 1, Nos. 10—15) from two milk
powderfactories, »A», Nastola, and »B», Somero (Fig. 3). Each of these samples represents one day’s milk intake — usually 60—80,000 |. — from more
than ten big dairies located within ca. 100 km radius around the factory.
‘The samples from factory »A» (Nos. 10—13) can be considered to represent
the general or »country-wide» samples of Southeast Finland, those from »B»
{Nos. 14—15) correspondingly the general samples of Southwest Finland.