GOO 



Report on Inspection Work of the 



Table III. — Ash, Sand and Silica in Feeding Stuffs {continued). 



Samples containing screenings and no sand 

 or only traces. 



Sample No. 



3232 



3233 



3243 



3820 



3840 



4037 



4050 



4151 



4198 



4283 



4374 



4376 



4392 



4418 



4449 



4462 



4484 



4510 



4528 



4580 



Average 



Ash. 



Per ct. 



96 

 36 

 69 

 15 



6.. 39 

 5.69 

 7.70 

 5.32 

 3.24 

 5.60 

 6.43 

 6.27 

 3.02 

 7.37 

 6.54 

 7.08 

 6.70 

 5.37 

 4.97 

 7.14 



5.79 



Silica. 



Per ct. 



.30 



.23 

 2.38 

 1.29 



.37 

 1.55 



.85 

 1.63 

 1.15 

 1.44 



.80 



.77 

 1.35 

 1.43 

 1.26 



.58 

 2.28 

 1.66 

 1.88 

 2.50 



1.28 



Samples free from screenings and sand. 



Sample No. 



Brewers' grains 



Malt sprouts 



Hominy feed 



Gluten feed 



Cottonseed meal . . . 



Alfalfa meal 



Linseed meal 



Com meal 



Wheat middlings. . 

 Distillers' grains. . . 

 3950 (compounded) 

 3933 (compounded) 

 3954 (compounded) 

 4031 (compounded) 

 4066 (compounded) 

 4551 (compounded) 



Average . 



Ash. 



Per ct. 

 3.11 

 5 

 2 

 4 

 7 

 7 

 5 

 2 

 3 

 4 

 2 



82 

 50 

 06 

 08 

 85 

 00 

 18 

 94 

 13 

 81 



5.41 

 4.81 

 5.66 

 3.00 

 5.58 



4.56 



Silica. 



Per ct. 

 1 



23 

 1.05 

 .14 

 .51 

 .15 

 .29 

 .27 

 .10 

 .12 

 .33 

 .83 

 .72 

 .56 

 .68 

 .74 

 .30 



.50 



The preceding figures are to a certain extent a measure of the pro- 

 portion of sand in feeds. They show clearly that samples containing 

 it average much higher in ash and silica than those in which it is 

 absent. 



The finding of sand has been substantiated in every case by careful 

 microscopical examination of the ash. 



COMPOSITION OF FEEDING STUFFS. 



A cattle food in its rdle as a " nutrient " is composed of groups of 

 chemical compounds which have certain functions to perform in the 

 production of energy and the building up of the animal body. The 

 determination of the amounts of these different groups constitutes 

 the chemical analysis of a feed. The groups are described as follows: 



Moisture. — The water content of a feeding stuff. All feeds con- 

 tain a varying amount of water, which is not considered as having 

 any nutritive value. 



Ash is the mineral matter of a food which remains after ignition. 

 It is composed chiefly of phosphates, chlorides, sulphates and car- 

 bonates of calcium, magnesium, sodium and potassium; and is valu- 



