( xxiv ) 
GUIDE TO THE PUECHASE OF ARTIFICIAL MANURES. 
AND FEEDING STUFFS. 
Feeding Cakes. 
1. Linseed-cake should be purchased as " Pure," and the insertion of this 
word on the invoice should be insisted upon. The use of such words as 
" Best," " Genuine," &c., should be objected to by the purchaser. 
2. Rape-cake for feeding purposes should be guaranteed *' Pure," and 
purchased by sample. 
3. Decorticated Cotton-cake should be guaranteed " Pure," and purchased 
by sample. 
4. TJndecorticated Cotton-cake should be guaranteed " Pure," and purchased 
by sample. 
N.B. — All feeding cakes should be purchased in good condition, and the 
guarantee of the vendor should be immediately checked by a fair sample (taken 
out of the middle of the cake) being at once sent for examination to a competent 
analytical chemist. The remainder of the cake from which the sample sent for 
examination had been taken should be sealed up in the presence of a witness, and 
retained by the purchaser for reference in case of dispute. 
Artificial Manures. 
1. Eaw or Oreen Bones or Bone-dust should be purchased as " Pure." 
Eaw Bones giiaranteed to contain not less than 45 per cent, of tribasic phosphate 
of lime, and to yield not less than 4 per cent, of ammonia. 
2. Boiled Bones should be purchased as " Pure " Boiled Bones guaranteed 
to contain not less than 48 per cent, of tribasic phosphate of lime, and to yield 
not less than If per cent, of ammonia. 
3. Dissolved Bones are made of various qualities, and are sold at various 
prices per ton ; therefore the quality should be guaranteed, under the heads 
of soluble phosphate of lime, insoluble phosphate of lime, and nitrogen or its 
equivalent ae ammonia. Tlie purchaser should also stipulate for an allowance 
for each unit per cent, which the dissolved bones should be found on analysis 
to contain less than the guaranteed percentages of the three substances 
already mentioned. 
4. Mineral Superphosphates should be guaranteed to be delivered in a 
sufficiently dry and powdery condition, and to contain a certain percentage of 
soluble phosphate of hme, at a certain price per unit per cent., no vaUie to be 
attached to insoluble phosphates. 
5. Compound Artificial Manures should be purchased in the same manner 
and with the same guarantees as Dissolved Bones. 
6. Nitrate of Soda should be guaranteed by the vendor to contain from 
94 to 95 per cent, of pure nitrate. 
7. Sulphate of Ammonia should be guaranteed by the vendor to contain 
not less than 23 per cent, of ammonia. 
8. Peruvian Ouano should be sold under that name, and guaranteed to be 
in a dry and friable condition, and to contain a certain percentage of ammonia. 
N.B. — Artificial manures should bo giiarantecd to be delivered in a suflBciently 
dry and powdery condition to admit of distribution by the drill. A sample for 
analysis should be taken, not later than three days after delivery, by emptying 
several bags, mixing the contents together, and tilling two tins holding about 
lialf a pound each, in the presence of a witness. Both the tins should be sealed, 
one kept by the purchaser for reference in case of dispute, and the other for- 
warded to a competent analytical chemist (or examination. 
