18 AGRICULTURAL ANALYSIS 



used for industrial purposes. The part for analysis is to be taken 

 from the above sample after it has been sent to the laboratory. 

 The method of procedure should be varied according to the con- 

 dition of the substances to be analyzed. 



The large sample selected from the goods delivered to com- 

 merce having been delivered at the laboratory, the analytical 

 sample is obtained as described in 16. 



22. Method of the International Congress of Applied Chemistry. 

 The committee designated by the Fifth International Congress 

 of Applied Chemistry has formulated the following general 

 principles of sampling fertilizers and component materials there- 

 of. 8 



1. Samples not drawn in accordance with these regulations are 

 to be refused by official analysts, such refusal being recorded on 

 the certificate. 



2. Samples are only to be considered as properly identified, if 

 drawn during unloading on railway or quay, in the presence of 

 representatives of both parties, or by a sworn sampler, and in ac- 

 cordance with these regulations. 



3. In the case of manufactured products, a sample is to be 

 secured by means of a sampling iron from every tenth bag, or if 

 the material is in bulk, from at least ten different places through- 

 out the parcel. 



4. In the case of shiploads of raw materials every fiftieth bag or 

 bucketful during discharge (corresponding to two per cent, ot 

 the whole) is to be set aside, and from this, after first crushing to 

 at least the size of a hazel-nut, a sample is to be removed for the 

 determination of moisture ; a further sample for the determination 

 of the constituents of value is to be obtained in the same way as in 

 the case of manufactured products after the sample has been re- 

 duced to a fine state by grinding and sifting. 



5. The samples in weight about 300 grams are to be filled 

 loosely into strong, clean and absolutely dry glass bottles. 



6. At least three samples are to be prepared. The bottles are to 

 be hermetically closed and sealed by the persons conducting the 

 sampling. 



6 Fiinfter, Internationaler Kongress fur angewandte Chemie, Bericht, 

 1904, 4 : 937. 



