PROSPECTS OP AGRICULTURE. 
567 
phoric acid abounds, and their component parts, let it be well 
understood, must be given back to the fields if it be in¬ 
tended that the soil shall retain its fertility. Potash and 
ammonia are, according to their prices, far more costly 
manure than phosphates, and in many cases quite as neces¬ 
sary for the field as this latter can be. Potash and ammonia 
are wholly inefficient and useless without the presence of 
phosphoric acid; but with the addition of phosphates they 
become efficient and valuable. The manufacturer of manure 
is not able to supply potash and ammonia to the farmer in 
sufficient quantity, and at an available price, but it is easy for 
him to collect the bones and make up the deficiency of phos¬ 
phate by drawing it from natural sources. It will, I think, be 
now perceptible what connection there is between the manu¬ 
facture of superphosphate and the utilisation of sewage. 
Baron Liebig concludes by referring to the immense im¬ 
portance of this cultivation in developing the agricultural 
resources of England: — The employment of sewerage in 
agriculture could make it possible to bring large tracts of 
land into cultivation which hitherto, owing to the expense of 
tillage, had been laid waste and neglected; others, too, might 
be so improved as to make the crops remunerative, and good 
yields would bring in a larger revenue. The vast capital which 
liiiherto has left the country to pay for corn and manure 
might be kept at home and employed for other purposes. 
Should the present state of trade and industry not materially 
change, a great part of this capital would be devoted to agri¬ 
culture, and the natural consequence would be that the 
increasing population wmuld find ample occupation in hus¬ 
bandry.’’ 
PhOSPECTS OP AGRICULTURE — NEIV CREATION OP 
ANIMALS. 
[From the ^ Times,*) 
Agriculture has been for a long time rising in the 
World. It used to rank as a slow' and plodding occupation, 
and its principal associations were smocks, corduroys, and 
hobnailed shoes. It was the most genuine piece of antiquity 
tliat was to be seen. Its instruments were coasval w'ith 
Cecro[)s and Trijitolemus; its tillage was the same as that of 
the Georgies, and had descended straight from the age of the 
‘ Odyssey,’ of Hesiod, and of the Pharaohs. A farm yard was 
a purer field of archaeology than Dover Castle, the Tower of 
