488 



H. MOHN. METEOROLOGY. 



[nORW. POL. EXP. 



Temperature above 0° 



Mean number of days with a temperature above ° for the whole year, 68. 



The absolute lowest temperature observed is — 52-°0 the 12"^ March 1894 



— - + 3- 5 - Ib^^ July 1894 

 Difference 55"°5. 



highest — 



THE INTERDIURNAL VARIABILITY OF THE TEMPERATURE 



OF THE AIR. 



Taking the difference between the diurnal mean temperature of one day 

 (Tables, pp. 403—468) and the next, and then the mean of the differences of rising 

 and of falling temperatures for each month, we obtain the numbers in the 

 first two columns in the Table below. The third column gives the weighted 

 mean of the two first columns. The monthly numbers of cases or days with 

 rising and with falling diurnal temperatures are in the 4*'^ and 5*'^ columns. 



