ETUDE DU CLIMAT PHOTOCHIMIOUE DU MEXIQUE 
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loop.m. 2270 S 4 Ci 70o48' 715 220 485 10 a. m., 35; 
2oop.m. 2270 S 4 C 2 58046' 715 238 477 12oo, 36. 
3oo p m 2270 Si C 4 45o28' 260 220 40 lp.m.,36. 
4oop. m . 2270 S 3 C 5 31<>27' 357 199 158 2 p. m.,28. 
6 avril 9ooa.m. 2270 S 4 Co 44oi3' 191 106 85 Forte brume. 
