842=57^ Influence of Chemical Discoveries on 
This table, published in a paper by Mr. Lawcs in the ' Jour 1 
of the Royal Agricultural Society,' second series, vol. x.. Part , : 
p. 11, showing the calculated value of the manure result ; 
from the consumption of purchased food, gives a con t ^ 
chemical estimate of the comparative manurial value wh i ^ 
the various kinds of feeding-stufts, after they have passed throi i 
the body of the animal, would possess if the whole of tt r 
fertilising constituents could be incorporated with the i% 
icithout loss. 
Probable losses In most cases, however, in the ordinary course of farming i 
in practice. certain loss, differing in amount according to a great variety f 
circumstances, will occur. 
Thus, when the food is consumed upon the land by sheep, i 
favourable seasons, the loss will be comparatively small. i 
the other hand, if cake or corn is consumed in open yards, i i 
district where the annual rainfall is excessive, and where, i 
account of scarcity of straw or other available litter, the man j 
produced is made under very unfavourable conditions, a la 
proportion of the soluble and most valuable constituents of j 
dung will run to waste. 
The loss due to the removal of the most valuable solu 3 
manure constituents of food by heavy rainfall is much m ? P 
considerable than the loss by evaporation ; and hence the man i 
produced under cover will be more valuable than that made 
open unspouted yards, where much of the soluble fertilis >; ^ 
material is washed out. In other localities, where the rain 1 r 
is small, and in some cases barely sufficient to make the sti / r 
and cattle excrements into manure, little or no appreciable ) s i 
in fertilising elements is experienced, although it may be m s 
in open yards. On farms where plenty of litter is used, it wo 1 
be incorrect to make the same deductions from the calcula I 
manure value of food as on those where the provision for reta - 
ing the soluble fertilising matters of farmyard manure is m J 
or less defective. 
Again, when the manure is produced in boxes in wh 
ing stock are copiously littered with cut straw, the loss in 
matters is less than when it is made in yards with long 
Cake and other concentrated food given to young grow j 
stock or to dairy cows supplies more or less of the substanc( f 
the bone and lean muscle of the growing stock, or of the u k 
constituents sold off the farm ; and in consequence the additio 1 
value of the manure resulting from the consumption of purcha 1 
food is less in these cases than in that of full-grown fatten ? 
stock fed upon the same description and same amount of cak 
Assuming that, under the most favourable circumstances, b 
manure value given in the above table be adopted, we hav( 3 
in 
lich fatt - ^ 
1 manur j P 
ig straw r 
