15 



bution of nitrogen and phosphorus in winter and spring- wheat and 

 their milling products, in both cases the milling products having been 

 ground from the same lots of wheat. The results obtained are shown 

 in the following table, which includes also values for protein obtained 

 b}^ multipl3dng the figures for nitrogen by 6.25: 



Table 2. — Nitrogen and phosphorus in wheat and its milling products. 



The figures in the table indicate that, while a larger part of the protein 

 is recovered in the flour than is the case with the phosphorus, there is, 

 nevertheless, a parallelism in the proportion of protein and phosphorus 

 in the different milling products. 



At the Arkansas Experiment Station, Teller" made a very thorough 

 and detailed study of the ash constituents of a sample of locally grown 

 medium hard winter wheat and its milling products. In milling 3,000 

 pounds of uncleaned wheat, 1.83 per cent was recovered as screenings 

 and 0.33 per cent as tailings, the percentage of milling products being 

 as follows: Patent flour 25.80, straight flour 42, low-grade flour 3.87, 

 dust room contents 1.17, ship stuff' 1.13, and bran 23.80. The loss of 

 material in grinding — that is, the material unaccounted for — was 

 therefore onl}' 0.07 per cent. 



The principal ash constituents and the sulphur and nitrogen in the 

 whole wheat and the different milling products were as follows: 



Table 8. — Ash constituents and nitrogen of lointer luheat and its milling j^foducts. 



Milling products. 



Wheat 



Patent flour 



Straight flour 



Low-grade flour 



Dust room material 



Shipstuflf 



Bran 



Total 

 ash.') 



Per ct. 



1.62 



.31 



.40 



.70 



2.50 



3.08 



5.25 



Silica. 



Per ct. 



1.04 



2.33 



1.28 



.50 



1.34 



.49 



.97 



In total a-sh. 



Ferric 

 oxid. 



Per ct. 

 0.27 

 .47 

 .26 

 .25 

 .30 

 .37 

 .27 



Potash. 



Per ct. 

 29. 70 

 38.50 

 36.31 

 32.27 

 30. 85 

 28.03 

 28.19 



Lime. 



Per ct. 

 3.10 

 5. .59 

 5. 65 

 4.. 51 

 3. .53 

 2.80 

 2.50 



Mag- 

 nesia. 



Per ct. 



13. 23 



4.39 



6.44 



9.33 



12.90 



13.27 



14.76 



Phos- 

 phoric 

 acid. 



Per ct. 

 .52. 14 

 48. 05 

 49.32 

 53.10 

 49.94 

 54.62 

 52.81 



Sul- 

 phur. 



Per ct. 

 0.13 

 .09 

 .10 

 .16 

 .15 

 .17 

 .21 



Nitro- 

 gen. 



Per ct. 

 1.96 

 1..54 

 1.75 

 2.13 

 2.17 

 2.78 

 2.73 



a Arkansas Station Bui. 42, pts. 1, 2. 



bThissum includes values which are given for alumina, chlorin, zinc, and sulphur trifixid, which 

 are not quoted in the table. The author regards the values for sulphur present in the different 

 materials as more reliable than those for sulphui trio.xid in the ash, owing to a probable volatilization 

 of sulphur in burning to obtain the ash. The other constituents omitted are not of much importance, 

 the alumina and zinc being accidentally present. 



