T3>££>' 



Meteorological and chemical laboratory on Pic du 

 Midi for the study of atmospheric phenomena. The 

 special laboratory of Muntz and Aurin for the in- 

 vestigation of the chemistry of the air. — Science et 

 nature. 



\ 



> 



Vertical ray seen from Paris. March 20, just after sun- 

 set. — V Illustration. 



■ 



Halo seen from the observatory of the Parc de Saint-Marc, March 25, at 11 a.m.. — I'll lustration. 



ff TEMPORARY FOREIGN JOURNALS. 



Supplement to SCIEXCE, Aug. 15, 1SS4. 



