FERTILIZER CONTROL STATION. 



379 



I 

 II 



in 



IV 

 V 

 VI 

 VII 



VIII 

 IX 

 X 

 XI 



XII 



XIII 



XIV 



XV 



XVI 



XVII 



XVIII 



Dried blood. 



•( t< 



" soft red blood 



*' blood 



Fish scrap 



Herring scrap 



Chicago hog tankage 



Beef tankage 



Meat meal 



Bone meal — 1-50 inch or less 



Ammonite, A 



Azotin 



Hoof meal — extremely fine 



Leather, A* 



« B* 



C 



D 



Horn & hoof meal, 1-25 inch or less, 



s 

 c 



o 



H 



% 



12.96 



13.06 



13.21 



11.98 



6.79 



6.56 



4.88 



2.86 



10.30 



3.41 



12.42 



9.70 



13.73 



13.05 



13.11 



6.75 



6.39 



14.67 





to 



rs is 



% 

 .35 



.87 



.31 



.59 



2.77 



1.14 



2.05 



1.47 



2.50 



1.08 



3.05 



2.09 



.50 



.41 



.52 



4.96 



5.90 



10.92 



I 



o 



(a 



73 



M a 

 Q bo 



% 

 12.61 



12.19 



12.89 



11.39 



4.02 



5.42 



2.83 



1.39 



7.80 



2.33 



9.37 



7.61 



13.23 



12.59 



12.59 



1.79 



.49 



3.75 



o 



n ® . 



5 tfl-a 



w o o 



97.29 

 93.34 

 97.58 

 95.08 



r 



59.20 

 82.62 

 57.99 

 48.60 

 75.73 

 68.33 

 75.44 

 78.41 

 93.36 

 96.84 

 96.03 

 26.52 

 7.67 

 25.56 



♦Samples Leather A and Leather B were sent to the Station purporting to be prepared 

 leather, but subsequtut inquiiy lailed to identify them as such. They are undoubtedly dried 

 blood. 



The percentages of solubilit}' in the pepsin solution shown above 

 agree in general with those obtained bj' other analysts in all cases 

 where similar materials can be compared. 



There is a notable difference in the solubility' of the two samples 

 of hoof meal XIII, and the horn and hoof meal, XVIII. Tliis 

 is due, in part at least, to the difference in mechanical condition, 

 sample XIII being about as fine as it could be ground. Next to the 

 leather the hog tankage VII, beef tankage VIII and fish scrap 

 V, have the lowest solubility. Dried blood uniformly has the highest. 



25 



