ARCTOWSKI, CHANGES IN DISTRIBUTION OF TEMPERATURE 93 



increase of temperature takes place all over the States, in the pleionian 

 as well as in the antipleionian area. Then, towards the end of the year, 

 the negativity of the antipleion increases with the increase in positivity 

 of the pleion. 



The contrast between the positive and negative departures decreased 

 and then increased. This particular case shows therefore very well the 

 importance of minor oscillations, talking place independently of the dis- 

 placement of pleions and which, at the same time, may interest largei 

 areas than those covered by pleions and antipleions. I reproduce only 



Fig. 46. — Departures of temperature 

 averages for Janiiary-Dcrember, 1D66 



Fig. 48. — Departures of temperature 

 averages for April, 1906, -March, 1907 





Fig. 47. — Departures of temperature 

 averages for February, 1906,-January, 

 1907 



Fig. 49. — Departures of temperature, 

 averages for June, 190G,-May, 1907 



the first two consecutive maps showing the junction of the two pleions- 

 (Figs. 44, 45). The other maps simply illustrate a progressive disap- 

 pearance of the southeastern center and the minor oscillations of tlie 

 southern antipleion. 



1906-1907. The maps of 1906 and 1907 (Figs. 28, 29), by their pre- 

 cisely opposite character, seem to indicate a simple seesaw oscillation in 

 the distribution of temperature. 



The consecutive maps contradict this supposition. The following dia- 



