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Prizes for Essays and Reports. 
4. Mode of mixing the bones with the acid, and of preparing the 
compost. 
5. Effect of various quantities applied in combination or comparison 
with common bones and other known manures. 
XI. White Mustard. 
Ten Sovereigns, or a Piece of Plate of that value, will be given for 
the best account of the Cultivation of White Mustard. 
Competitors will be required to attend to the following points : — 
1. Quality of land on which sown. 
2. Mode and time of sowing, and quantity of seed. 
3. Period of maturity, according to the season of the year. 
4. Application of crop, whether as green manure or to be fed off. 
XII. Drainage of Running Sands. 
Ten Sovereigns, or a Piece of Plate of that value, will be given for 
a description of the best method of Draining Running Sands. 
XIII. Potato Disease. 
Fifty Sovereigns, or a Piece of Plate of that value, will be given by 
His Grace the Duke of Northumberland for the best Essay on the 
remedy for the Potato Disease, and on its treatment in the various stages 
of planting, growth, and preservation. 
Competitors for this prize will be required to furnish information 
under the following heads : — 
1. An account of the Growth of the Potato during the last year, 
with reference to the nature of the season. 
2. The nature and cause of the disease. 
3. The remedies for the disease, explaining the principles on which 
the remedy is founded. 
4. The Treatment of the Potato in planting, both from the tubers 
and from the seed, and in various stages of its growth. 
5. The mode of pitting and preserving Potatoes in ordinary seasons, 
with the principles upon which any improved plans may be 
founded. 
Twenty Sovereigns, or a Piece of Plate of that value, will be given 
by His Grace the Duke of Northumberland for the second best Essay 
on the same subject. 
Thirty Sovereigns, or a Piece of Plate of that value, will be given 
by His Grace the Duke of Northumberland for the best History of 
the Disease at the present time affecting the Potato ; involving a con- 
densed detail of facts developed by experiments. 
