82 
Utilisation of Town Sewage. 
accidental, thougli unavoidable circumstance, must be attributed 
the very low proportion of dry substance found in some cases. 
" The general result w^as, that the animals which had the un- 
sewaged grass received considerably more dry or solid substance 
in a given weight of the fresh produce than those which had the 
sewaged grass. Hence, though the oxen on unsewaged grass 
consumed much less of the fresh food in relation to their weight 
than those on the sewaged, they nevertheless took into their 
stomachs quite as large a proportion of real dry or solid matter as 
the others. The cows on the unsewaged grass consumed, how- 
ever, even more of their fresh food, with its higher proportion of 
dry substance, than did those on the sewaged ; and they, at the 
same time, gave a larger quantity of milk, almost exactly in pro- 
portion to the increase in the amount of fresh food consumed. 
But, as a given weight of the fresh sewaged grass contained con- 
siderably less dry or solid substance than an equal amount of 
the unsewaged, it resulted that considerably more milk was 
obtained from a given quantity of the dry or solid substance of 
the sewaged than of the unsewaged grass. 
" The question arises, was there any difference in the compo- 
sition of the dry or solid matter of the two kinds of grass such as 
may be supposed to account for the gi-eater productiveness, at 
any rate in milk, of that from the sewaged land ? The following 
Summary Table relates to this point. 
" Table VIII. — Showing the mean Composition (i)er cent.) of the Dry Sub- 
stance of tlie Grass produced without and with Sewage, and in each 
successive Crop. 
First Season, 1861. 
Without and with Sewage. 
EatJh successive Crop. 
Un- 
sewaged. 
Sewaged. 
1st 
Crop. 
2nd 
Crop. 
3rd 
Crop." 
4Ui 
Crop. 
Plot 1. 
Plot 2. 
Plot 3. 
Plot 4. 
ifumbcr of Analyses \ 
giving the means . j 
5 
7 
9 
9 
11 
9 
7 
5 
Nitrogenous substance I 
(NX 63) . . . 5 
13-08 
18 -67 
18-92 
19-73 
10-33 
18-07 
23-76 
28-25 
Fatty matter (ether ex- 1 
tract) .... J 
AVoody fibre .... 
other non - nitrogenous 1 
substances ... J 
3-21 
28-80 
45-66 
3-54 
29-34 
37 09 
3-53 
30-15 
35-94 
3-44 
29 -13 
35-92 
3-01 
30-80 
47-79 
3-60 
28-45 
38-28 
3-65 
28-50 
30-84 
3-84 
28-60 
24 57 
Mineral matter (ash) . . 
9-25 
11-36 
11-46 
n-73 
8-07 
11-60 
13-25 
14-74 
100-00 
100-00 
100 00 
100-00 
100-00 
100-00 
100-00 
100-00 
" The figures in this table do indeed show a considerable dif- 
ference in the composition of the dry substance of the unsewaged 
