(155) 



Starting from 4-bromo-2-amido-?«-xylene prepared according to 

 NöLTiNG^), we obtained 4-5-dibromo-2-aniido-??i-xylene by bromination 

 and from this 2-4-5-tribromo-??i-xylene was prepared according to 

 Sandmeyer. 



6. Finally, tribromo-^^-xylene was prepared according to the sub- 

 joined scheme. 



Consequently all six tribromoxylenes had been obtained. 



CH, CH, CH, CH, CH, CH, 



Br/XCH, XXCH, Br/\Br BiX\ //\Br /\Br 



l8G°| |!05o| I 85° I |l05o| | 87° | | 89° | 



N. /Br Br\ v^Br V ^CH, Br\ /CH, Br\ /CH, Br\ /Br 



Br Br Br Br Br CH, 



We wish here to express our thanks to Prof. Fkanchimont, who 

 kindly presented us with the specimens for this research. 



Zaandam, j^^^. ^^^^^ 

 Amsterdam, 



Meteorology. — "Oscillations of the solar activity and the climate" . 

 (Second communication '). By Dr. C. Easton. (Communicated 

 by Prof. C. H. Wind.) 



(Communicated in the meeting of May 27, 1905). 



At the end of the first communication on this subject the suppo- 

 sition was started, that the 11-year oscillation of temperature with 

 regard to the eleven-year cycle of the sun's activity generally was 

 accelerated in the cold, retarded in the warm part of the larger 

 oscillation. In order to investigate this matter more thoroughly, I 

 proceeded as follows: 



1) Ber. 34, 2261. 



8) See for the First Communication; Proceedings of Nov. 26, 1904, p. 368. 

 In that paper p. 372 read 89-years instead of 178-years. Furthermore strike out 

 what has been said on p. 3G9 about the experiment of Savélief. 



11 



Proceedings Royal Acad. Amsterdam. Vol. VIII. 



