Essays arid Reports on Various Subjects. Ixxvii 



5. That the judgment of those dairymen, in regard to the prize, will be 

 directed not so much to the quality of the butter as to its sweet- 

 ness, and the probability of its preservation at home and in warm 

 climates. 



9. Varieties of Wheat suited to Different Soils. 



Fifteen Sovereigns, or a Piece of Plate of that value, will be given for 

 the best Account of the Varieties of Wheat suited to Different Soils. 



N.B. — As it is well known that many soils will not bring forth in per- 

 fection the best varieties of wheat — particularly of white wheat 

 — it is desirable to know what is the best wheat which each soil 

 is capable of producing. 



10. On the Food of Plants. 



Twenty Sovereigns, or a Piece of Plate of that value, will be given for 

 the best Essay on the Food of Plants. 

 Competitors will be required to state — 



1. The sources from which plants derive the elements of which they 



are composed. 



2. The mode in which farm-yard dung strengthens the growth of agri- 



cultural crops. 



3. The mode in which other manures, whether singly or combined, act 



upon vegetation. 



These Essays must he sent in to the Secretary on or before 

 March 1st, 1842. 



N.B. — General Conditions for all Experiments on Soils or Manures. 



1. The nature and depth of the soil. 



2. The proportions of clay, sand, lime, or other substances, of which the 

 soils are composed : or, otherwise, to send specimens of the soils (in quan- 

 tities of a pound or pint of each variety) to the Secretary, on his application 

 for them. 



3. The nature of the subsoil. 



4. When the ground is not level, the degree in which it slopes, and the 

 direction (north, east, &c.) of its inclination, as found by the compass. 



5. The two or three preceding crops; the manure put on for them, and 

 the produce of these crops. 



