xxx Prizes for Essays and Reports. 
2. The best remedy against its attacks on the hop-plant, and pre- 
ventive against its ravages by sowing other seed in hop- 
gardens, or by other means. 
3. Whether it attacks other plants ? 
4. Whether the disease in the hop-plant called " honey " is occa- 
sioned by the hop-fly, or arises from some other cause ? 
Tliese Essays must be sent to the Secretary, at 12, Hanover. Square, London, 
on or before March \st, 1847, excepting the account of the Manure for Wheat, 
which must be sent vn or before September \st, 1847. 
Contributors of Papers are requested to retain Copies of their Communications, as 
the Society caimot be responsible for their return. 
RULES OF COMPETITION FOR PRIZE ESSAYS. 
1. All information contained in Prize Essays shall be founded on experi- 
ence or observation, and not on simple reference to booi<s, or other sources. 
2. Drawings, specimens, or models, drawn or constructed to a stated 
scale, shall accompany writings requiring them. 
3. All competitors shall enclose their names and addresses in a sealed 
cover, on which only their motto, and the subject of their Essay, and the 
number of that subject in the Prize list of the Society, shall be written. 
4. The President or Chairman of the Council for the time being, shall 
open the cover on which the motto desitjnating the Essay to which the Prize 
has been awarded is written, and shall declare the name of the author. 
5. The Chairman of the Journal Committee shall alone be empowered to 
open the motto-paper of such Essays, not obtaining the Prize, as he may 
ihinlv likely to be useful for the Society's objects, with a view of consulting 
the writer confidentially as to his willingness to place such paper at the 
disposal of the .Journal Committee. 
6. The copyright of all Essays gaining prizes shall belong to the Society, 
who shall a(-cordin!^ly have the power to publish the wliole or any paitof 
such Essays ; and the other Essays will be returned on the application of the 
writers ; but the Society do not make themselves responsible for their loss. 
7. The Society are not bound to award a prize unless they consider one 
of the Essays deserving of it. 
8. In all reports of experiments the expenses shall be accurately detailed. 
9. The imperial weights and measures only are those by which calcula- 
tions are to be made. 
10. No prize shall be given for any Essay which has been already in print. 
11. Prizes may be taiicn in money or plate, at the option of the successful 
candidate. 
12. All Essays must be addressed to the Secretary, at the house of the 
Society. 
