ERRATA. 



Pfige 19, line 4, Insert ' 1905 ' after the date. 

 51, „ 12, for ' 2.28S ' read ' 2.20^.' 

 73, „ 14, „ '39.0' „ '3ß.O.' 

 „ 10.3, ,. 14, „ '28' „ '4.' 



PI. Xn, for the vertical scale of Inuboye. replace that 



similar to PI. XI. 

 „ XXV, in the vertical scale, for • 50,' ' 100 ' and ' 150.' 

 read ' 5,' ' 10 ' and ' 15.' 



