xc  Agricultural  Education — Examination  Papers,  1883. 
10.  Supposing  upon  the  strong  land  you  have  some  couch-grass 
and  weeds,  how  would  you  prepare  the  land  for  each  crop  you  have 
named,  and  to  what  crop  would  you  apply  lime,  and  to  what  crop 
farmyard-manure  ? 
11.  Give  a description  of  land  upon  which  sheep  are  most  liable 
to  fluke  or  liver-rot.  State  the  best  mode  of  prevention  and  of 
treatment. 
12.  Under  what  conditions  and  for  what  reasons  is  a Lady-day 
entry  upon  a farm  to  be  preferred  to  a Michaelmas  entry. 
13.  Having  the  live-weight  given  of  fat  cattle  and  sheep,  how 
would  you  estimate  the  dead-weight,  specifying : inferior  quality, 
middling  quality,  prime  quality. 
14.  Describe  and  name  the  most  common  sorts  of  couch,  or  squitch, 
or  creeping  grasses  found  on  foul  arable  land.  Which  are  the  most 
difficult  to  eradicate,  and  why  ? 
EXAMINATION  IN  CHEMISTEY. 
Maximum  Number  or  Marks,  200.  Pass  Number,  100. 
Wednesday,  May  9th,  from  10  a.nu  till  1 p.m. 
I.  General  Chemistry. 
1.  Show  how  to  determine  accurately  the  proportion  of  oxygen  to 
nitrogen  in  atmospheric  air.  Explain  the  causes  which  tend  to  keep 
that  proportion  nearly  constant ; and  why  it  is  that  the  proportion  of 
aqueous  vapour  to  the  other  ingredients  is  so  much  more  variable. 
2.  How  much  nitric  acid  can  be  made  from  7000  grains  of  sodium- 
nitrate,  and  how  much  from  the  like  weight  of  calcium-nitrate  ? 
(O  : N : Na  : Ca  = 16  : 14  : 23  : 40.) 
3.  How  do  you  account  for  the  high  temperature  of  an  oxy- 
hydrogen  blow-pipe  flame  ? What  precautions  have  to  be  taken  in 
burning  the  mixed  gases,  and  on  what  grounds  ? 
4.  Give  an  account  of  the  mode  of  preparing  and  collecting  olefiant 
gas,  and  explain  the  chemistry  of  the  process.  Describe  the  general 
properties  of  that  gas,  and  show  how  it  differs  from  marsh  gas  in 
composition  and  in  characters. 
5.  Explain  how  to  prepare  (1)  sodium-sulphite,  (2)  sodium-sul- 
phide. What  is  the  effect  of  hydrochloric  acid  on  each  of  thoso 
substances  ? How  do  you  explain  the  antiseptic  property  of 
sulphites  ? 
6.  Explain  the  chemical  effects  of  exposure  to  weather  of  iron, 
7. inc,  copper  and  lead  respectively.  Why  is  rain-water  more  liable 
than  spring-water  to  be  contaminated  by  lead  after  storage  in  a 
leaden  tank  ? By  what  tests  could  you  detect  (1)  lead,  (2)  iron,  in  a 
sample  of  water  ? 
