Experiment on the Elementary PrincijAes of Manure. 529 
of the Society should undergo an entire revision ; and on my 
return to London I expressed these sentiments at the August 
Council Meeting; adding, that although no implement could be 
regarded as at present in a perfect state, still that the time might 
come when the implements might be arranged into classes for 
the purpose of more extended trials. 
The trials at Carlisle, although made under unfavourable cir- 
cumstances of weather, were viewed with great interest by 
numerous visitors, who appeared to give more than usual atten- 
tion to their details. In addition to many large proprietors and 
distinguished agriculturists of the district, including the Earl of 
Burlington, &c., the meeting of the Society was also attended by 
Baron d'Usedom, the late envoy of the king of Prussia to this 
country, and the Baron Bettino Ricasoli, a distinguished landed 
proprietor of Tuscany, and one of the most intelligent patrons of 
agriculture in that part of the Continent. 
I cannot conclude this Report without expressing my cordial 
thanks to my Colleagues and to the Judges, who were inde- 
fatigable in their exertions to effect the objects of the meeting, 
and to whom I was myself greatly indebted for their kindness 
and co-operation. 
Wm. Fisher Hobbs. 
XXIV. — Experiment on the Elementary Principles of Manure as 
applied to the Growth of Wheat. By the late Ph. Pusey. 
[It is believed that the following paper was written by its lamented author 
about the time at which he was prevented by severe domestic affliction from 
taking, at Lincoln, the honourable place assigned to him by the JSociety as 
its President for the second time, and shortly before hi.s last illness. Its 
publication was delayed in the hope that he might live to give it his final 
correction ; but, as it is, it will doubtless be received with interest by many 
of the members, as his last act in the service of the lioyal Agricultural 
Society.] 
Having a field of 8 acres set apart from common cultivation for 
the purpose of accurate experiment, year by year, on which 
five white crops having been grown in succession, the natural 
powers of the soil seemed sufficiently exhausted for the accurate 
test of artificial manures, it occurred to me that the most inte- 
resting use to be made of it might consist in the separate appli- 
cation of those elements which are supposed to constitute con- 
jointly the efficacy of farmyard dung, and separately to act as 
fertilizers of the soil. 
These, according to the received theory of agricultural science, 
will be comprised under four heads : — 1. Nitrogenous substances; 
