Jan  1,  1897.1  Supplement  to  the  “ Tropiccd  Agriculturist^ 
511 
anything,  except  pure  cocoa  under  the  name  of 
cocoa,  and  to  decree  that  all  parcels  containing 
mixture  shall  bear  in  plain  figures  an  indication 
of  the  percentage  of  adulterants.  It  is  said  tliat 
the  great  majority  of  the  Dutch  cocoa-manufac- 
turers have  signed  the  memorandum,  which  is  about, 
to  be  laid  before  the  States-General. 
Dr.  Somerville,  Prof,  of  Agriculture,  Newcastle, 
draws  particular  attention  to  the  benefits  of  mixed 
manures  even  of  the  same  class,  in  a paper  on 
“ some  aspects  of  the  practice  of  manuring.”  He 
says : 
The  reason  why  a complex  dressing  produces 
a larger  crop  tlian  a more  simple  application  is 
not  far  to  seek.  Where  plants  are  fed  on,  let 
us  say,  one  form  of  phosphate  the  probabilities 
are  that  their  phosphatic  food  is  either  too 
soluble  or  not  soluble  enough,  so  that  they 
either  get  too  much  in  the  early  part  of  the 
season  and  are  starved  later,  or  vice-versa.  But, 
on  the  other  hand,  if  one  offers  plants  a mixture 
of  phosphatic  foods  differing  in  their  degree  of 
solubility,  the  plants  feed  upon  the  most  easily 
assimilable  portion  in  t he  early  part  of  the  sea- 
son, and  as  that  is  gradually  exhausted  the  other 
forms  come  into  use  and  supply  the  crop  with 
suliicient  nourishment  later  in  the  year.  And 
similarly  with  regard  to  nitrogenous  and  potassic 
food.  In  this  way,  then,  the  crop  is  well  supplied 
with  nourishment  right  through  the  period  of 
growth,  and  a maximum  yield  at  the  minimum 
cost  is  the  result. 
Among  the  subjects  which  are  lectured  on  or 
taught  practically  in  the  Glasgow  Technical  College 
are  Agriculture  and  Agricultural  Chemistiy,  Agri- 
cultural Botany,  Forestry,  and  Horticulture, 
Poultrykeepin,  Beekeeping,  and  Butter  making. 
