ERRATA IN LAST NUMBER. 

 I'nge 102 column headed 6 

 for 67 read 167 

 ., 17 „ 117 

 „ 116 „ 36 

 „ 33 „ 3 

 Page 104 four lines from bottom column headed 5, where 



figure has dropped out, supply 5*88. 

 Page 104 eight lines from bottom 

 for 7-81 read 7-87. 

 „ 8-55 „ 555. 



