110 Compensation for Unexhausted Manurial T allies. 
* 
his discretion, and make such deductions as, in his opinion, are 
justified. But, seeing that manure, be it ever so badly kept, 
can only to a limited extent be deprived of its manurial 
constituents, and that the more insoluble portions will remain 
in the dung despite much washing by rain, we have felt it wise 
to insert the provision that any deduction on account of bad 
storage shall not exceed 50 per cent, of the value as set out in 
our column D (1) ; that is, even in the worst cases a figure not 
lower than one-half the corresponding one in our Table D (1) 
will represent the value of the manure. 
New Feeding Materials. 
We have been frequently asked if we would be willing to 
extend our Table of Foods by the inclusion of further items, 
new feeding materials, &c. While this is undoubtedly desir- 
able in the case of foods in regular use, we feel it necessary to 
avoid overloading our Tables with matter that would only be 
of occasional use. 
For the same reason we think it desirable to exclude all 
articles which are really of a “ proprietary ” character, and 
others which come on the market for a time and then dis- 
appear. Moreover, the Fertilisers and Feeding Stuffs Act now 
obliges vendors to give on the invoice the analysis of the 
foods which they sell. Included in such statements are the 
albuminoids, and from these the nitrogen — which is the main 
manurial constituent — can be obtained by dividing the per- 
centage of albuminoids by 6J. The phosphoric acid and 
potash are of minor significance, and will not vary in foods to 
the extent that the albuminoids do. It is accordingly com- 
paratively simple in the case of a material not included in our 
Tables, but with the analysis in hand, to assign to it, by 
comparison with foods of like composition, its appropriate 
place in the Table and its manurial value. 
Our opinion has been asked if we would include such 
things as gluten meal, meat meal, compound cakes, and “ pro- 
prietary ” articles such as “ uveco,” “ molassine meal,” &c., also 
treacle. 
The use of some of these does not seem to us sufficiently 
general to warrant their inclusion, while others, such as 
“ molassine meal ” and treacle, have no appreciable manurial 
value at all. At the same time we have thought it well to add 
to our list three further materials. These are soya bean cake, 
earth-nut cake, and Bombay cotton cake. The widespread use 
of the latter makes it desirable to separate it from the ordinary 
or “ Egyptian ” cotton cake, and this we have accordingly 
done. 
