120-122] Sampling of Manures 87 



as mentioned before, one sample being sent for analysis and 

 the other retained for reference.' 



120. The sampling of feeding meal and grain is conducted 

 in exactly the same manner as that of manures. 



191. The Sampling of Oil Cakes.— Very frequently a 

 farmer will break a small piece off the corner of an oil cake 

 and send it for analysis. ' This is pretty sure to lead to an 

 erroneous result. It is well known that the percentage of oil 

 varies considerably in different parts of a cake. Again, the 

 cakes may vary considerably one from another. Dr. Voelcker, 

 in the article already quoted, recommends the following pro- 

 cedure : 



' A purchaser should first look over the cakes comprising 

 the delivery, and note any difference of appearance that may 

 strike him, or see whether all the cakes seem much alike. He 

 should then select samples from each different variety he 

 notices, the number of samples being in proportion to the 

 number of cakes of each kind that make up the bulk. Three 

 or four cakes of each sort should be selected, or, if uniform 

 throughout, say six cakes from the whole lot ; pieces should 

 be broken out of the middle, and these pieces passed through 

 a cake-breaker. The broken nuts or lumps must next be 

 mixed up thoroughly and then divided successively, just as was 

 advised in the case of manures, until only a couple of pounds 

 weight are left. Two tins may now be filled with the cake, 

 one for sending to the analyst, the other to be kept for 

 reference.' 



By the sentence 'Pieces should be broken out of the 

 middle ' is meant ' Break a whole cake across the middle ; then 

 off each of the halves take a strip about 4 inches wide, also 

 right across the cake, and from what was before the middle 

 piece of the whole cake.' 



122. The Sampling of Hay Silage, &c— When a stack 



