EKRATA 



Page 530, line 30, " grain " slioiild be " gram ". 



" 532, Jines 19, 20 and 21, " grain " should be " gram ". 



" 842, line 3, put " O " after K,. 



" 878, line 39, 3d column, " Olinion " should read 

 " Clinton ". 



Page 891, line 18, last column, " dressed " should be " pressed ". 



" 905, line lY, " TiQ^" should be " TiO./'. 



