46 FORESTRY OF NORWAY. 
distribution and growth of trees is different when the 
deposit is in the form of snow from what it might have 
been had it been in the form of rain; therefore this also 
demands attention. 
‘At Vardo rain falls during 54 days, and snow during 
71 days of the year. The Dovrefjeld has 41 days of rain 
and 48 of snow. In all other places at which observations 
have been made rain falls much more frequently than 
does snow. At Christiania the days of rain are double 
those of snow; at Bergen the number is five times as 
great, and at the Lofoden Islands 1'5 times greater. 
As might have been anticipated, the greatest quantity 
of snow falls in the winter. The summer months are 
generally exempt from snow, even in Finmark ; at Vardo 
there is no fall of snow in July and August. This is also 
the case at Bodo. At the Lofoten Islands, on the contrary, 
snow may fall any day, even in the months of July and 
August, snow falling in each of these months upon an 
average three times in ten years. In Southern Norway 
the months of June, July, August, and September are 
free from snow. 
At Vardo, and on the Dovrefjeld the number of days of 
rain and of snow are about equal in May and in October; 
elsewhere it isso in the beginning of April and in Novem- 
ber; and on the west coast it is only so in the month of 
March. At Bergen the number of the days of rain is in 
excess of that of the days of snow. 
The quantity of rain falling in a day is pretty variable. 
Least considerable in the central part of the country, it is 
there calculated on the mean of the year, about 4 mm., 
16 inches; it increases towards the coast At Vardo and 
Bodo it is about 6 mm., ‘24 inches; at Christiansand, 
Skudesnaes, and Sandoesund, from 7 to 8 mm.; at Bergen 
and Mandal, about 11 mm., ‘44 inches. It is pretty nearly 
proportionate with the annual rainfall, and with the num- 
ber of rainy days. We may thence evolve the general 
law that in these places in which there is the greatest 
abundance of rain, this is attributable to the.combination 
of the three elements—frequency, force, and duration. 
