E. J. Russell and E. H. Richards 331 



high ammonia and nitrate content, suggesting that it arises by evapora- 

 tion of water from the soil and condensation at higher altitudes than 

 in the dUse of winter rain. 



&, 



JS 



9 "^1 *? 



<?* C'l ?c w f^ c-i ro M c-) fo ?5 cc w 



O^^^f0-^^^O'^5^^'-^ 



^(NcOfMSO^OcOMOXiO 



Q^ ^ g CO '^ (^^ o A M CO c-i '^» fb «i 



^ O gAio-^c^i»b(NcbNM<Nc^ 



PQ 



T3 I 

 X! I ex 



■E O -H S X -H 



llllllllll ^ C^i X. v^ 

 CDt~"X050'-^C^»fO'4<lO . fe. 



«t 



