14 



Rogers' Pure Knuckle Bone Flour, No. 894. Nitrogen found 

 3.89%, guaranteed 3.82%; phosphoric acid found 23.16%, guaran- 

 teed 24.70%. 



Ground Tankage. Twenty-two samples of tankage have been 

 inspected, necessitating 21 analyses. Seven of these samples were 

 found deficient in nitrogen. The average total nitrogen found was 

 7.32 per cent. The average phosphoric acid found was 11.11 per cent. 

 The average retail cash price has been $44.36 per ton. Assuming 

 that the pound of phosphoric acid in tankage is worth 5 cents, the 

 cost of a pound of nitrogen from this source would have been 22.7 

 cents. Three brands were found to have commercial shortages of 

 over 50 cents per ton. They are as follows: 



Armour Fertilizer Works. Tankage, No. 311. Nitrogen found 

 6.97%, guaranteed 7,40%; phosphoric acid found 7.78%, guaranteed 

 6.87%. 



Home Soap Co. Tankage, No. 58. Nitrogen found 4.97%, 

 guaranteed 11.00%; phosphoric acid found 20.22%, guaranteed 

 1.68%. This same brand was found seriously deficient in nitrogen 

 in 1916. The manufacturer promised to have the guarantee changed 

 to conform to the actual composition of the goods, and to have new 

 tags printed before further sales were made of the product. We have 

 every reason to believe that the manufacturer Hved up to this promise. 

 Sample No. 58, which is herewith published, was stock carried over 

 by one of their agents and upon which the agent neglected to attach 

 the new tags, furnished by the manufacturer giving the revised 

 guarantee. As nearly as we could ascertain, it was entirely the 

 agent's fault. Prosecution and conviction followed our investiga- 

 tion of the case. On another sample of this brand the revised guaran- 

 tee was found to be well maintained. 



Nitrate Agencies Co. Ground Tankage 7-7 Brand, No. 914. 

 Nitrogen found 5.58%, guaranteed 5.75%; phosphoric acid found 

 6.86%, guaranteed 6.86%. As soon as the company's attention was 

 called to this deficiency, through an advanced report, they took 

 immediate steps to reimburse the purchaser for the deficiency. An 

 allowance was also made the consumer for an unsatisfactory mechani- 

 cal condition of the tankage. 



Dry Ground Fish. Forty-two samples of fish were inspected, 

 necessitating 27 analyses. Ten samples were found deficient in 

 nitrogen and eight in phosphoric acid. The average retail cash price 

 has been S54.91 per ton. The average total nitrogen found was 8.13 

 per cent. The average phosphoric acid was 10.07 per cent. Allowing 

 5 cents as the value of a pound of phosphoric acid, the nitrogen in 



