274 THE FOREST LANDS OF FINLAND. 
Brought forward, 73,191,794 tonnland, 
Of arable land, - - - 1,690,822 5 
Of rocky land and roads, - 99,696 a 
Total, 74,982,312 ,, 
The mean temperature at Hango, the most southern 
part of Finland, is 5° Celsius, lat. 62°, the northern 
limit of the satisfactory culture of wheat. The mean 
temperature is 3° lat. 64°, is the northern limit 
arter (legimumes), and half a degree to the north of this 
is that of oats. The mean temperature in this region is 2°. 
In 65.50, is that of hemp. The mean temperature here 
is 1°. From 67° east, to 68° on the cvast, is that of rye. 
About and in 69° that of barley. Here the mean 
temperature is 0°. 
Between latitude 60° and 62° there occur in the following 
order the northern limits of the trees named :—the oak, 
the ash, the hazel, the maple, and the elm; between 62° 
and 64° those of the lime and the mountain ash ; about 
65° that of the elder; about 68° that of the aspen; and 
between 68° and 70° those of the spruce, the pine, and the 
birch. 
In a Finnish Atlas of physical geography, Sounenmaan 
Kastasto Kouleyen Tarpeeksi Tehuyt Vuonua, 1878, by I. J. 
Inberg, are supplied indications of these and numerous 
other matters pertaining to the physical geography of the 
country, and several similiar maps are appended to statis- 
tical notices, prepared in view of the Paris Exhibition of 
1878 by Dr Ignatius, and published at the expense of the 
Finnish Government. Amongst others, one representing 
the limits toward the north, to which some twenty-eight 
vegetables extend in Finland, the range of them growing 
wild is given in one colour, the range of the same or 
others growing under cultivation is given in a different 
colour. When the northern limits of a plant. differs 
in the east and, in the west of the country, or is only 
known at isolated localities, these are indicated by points, 
under which is svated the corresponding longitude reckoned 
