BXJLLETIISr 374, U. S. DEPAiRTMENT OF AGRICULTURE. 





-/a % T-=- 







METHOD OF DETERMINING COMPARATIVE VALUES ON A DRY-MATTER 



BASIS. 



The comparative values given in Tables II to XII, inclusive, are 

 based on the dry matter contained in a unit of weight. The water 

 contained is not considered as having any intrinsic value; therefore 

 the whole value for any unit of weight is credited to the dry matter 



which it contains, 

 j ^^^±""^1 The method of arriv- 

 "~^ ing at comparative 



values of the dry mat- 

 ter contained in a unit 

 of weight, when every- 

 thing but moisture is 

 considered as being 

 equal, is explained in 

 the solution of the fol- 

 lowing problem : 



Example.— li the dry 

 matter in a unit of weight 

 (bushel, 100 pounds, etc.) 

 of any grain, cottonseed, 

 or similar product testing 

 10 per cent in moisture is 

 worth §1.20, what is the 

 value of the dry matter in 

 a similar unit of weight of 

 the same product which 

 tests 16 per cent in mois- 

 ture? 



A unit of weight of 

 grain, cottonseed, or 

 similar product test- 

 ing 10 per cent in 

 m.oisture contains 90 

 per cent of dry matter 

 and 10 per cent of 

 water. If the 90 per 

 cent which is dry mat- 

 ter is worth S1.20, then each 1 per cent of the dry matter is worth 

 1/90 of S1.20, or 1.3333+ cents, and the dry matter in a similar 

 unit testing 16 per cent in moisture and therefore having 84 per cent 

 of dry matter is worth 84 X 1.3333+ cents, or $1.12. This is graph- 

 ically illustrated in figure 3. 



If it is desired to extend any one of Tables II to XII, inclusive, so as 

 to ascertain the comparative value of a imit which contains either 

 more or less moisture than any unit shown in the table, it is only 

 necessary to calculate the percentage of dry matter contained in this 



I 





Fig. 3. — Diagram, illustrating the comparative values cf the dry mat- 

 ter in two 1-bushel units of wheat testing 10 and 16 per cent in 

 moisture, respectively, based on a bushel of wheat testing 10 per 

 cent in moisture being worth S1.20. 



