190 
We find then: # 
1. Daily means, barometer 160928' 089 
idem, even groups 156°57' | 164 
idem, uneven groups 164259” S: 
2. Daily range, barometer 4457 : 
idem, even groups 379 | Я 
idem, uneven groups 602547 | 45928 — 
5. Daily means, therm. even groups 50225! | 
4. Daily range therm. even groups 57997 ! 
The mean values have been calculated in the same -— 
the probable value af В, by assigning the same weights tothe 
different angles as have been given to the values of R. Ih 
agreement of the different values deduced from the independer 
groups is very satisfactory, and it must be considered asa wl 
proved fact that the barometric range, the mean temperatu 
and the thermometric range are subjected to the same регінігі 
variation, all three increasing and decreasing at the same іше 
the mean atmospheric pressure however, although subject p 
variation of the same period, attains its maximum value at T 
which differ from those of the other elements, thus indicatii 
that the influence on the latter may be ascribed to the SÉ 
immediate cause, the temperature for instance, whereas Lë 
influence on the barometric daily means has to be deriet 
from another source. 
6. The question of the accuracy which must be авай" 
the value: 
25.812 | 
is a very difficult one because it is dependent on many p 
and cannot well be solved by theoretical considerations: 
most influential factor being the variability of the element 
which it is difficult to represent by a suitable analytical ех” 
sion. I have therefore, in order to come to ап approximate am = 
to this question, followed the practical way by applyins ~ 
method to an analogous problem the solution of which EEN 
The chosen problem is to determine the duration Ё 
