ERRATA IN LAST NUMBER. 

 Page 102 column headed 6 

 for 67 read 167 

 „ 17 „ 117 

 „ 116 „ 36 

 „ 33 „ 3 

 Page 104 four lines from bottom column headed 6, where 



figure has dropped out, supply 5"88. 

 Page 104 eight lines from bottom 

 for 7-81 read 7'87. 

 „ 8-55 „ 5-55. 



