15 



Phosphoric Acid. 



Soluble in water 4.5 4.5 



Soluble in neutral ammonium citrate solution 



(reverted phosphoric acid)** 4. 4. 



In fine* ground bone and tankage 4. 4. 



In coarse* bone, tankage and ashes 3.5 3.5 



In cottonseed meal, castor pomace and linseed 



meal 4 . 4 . 



Insoluble (in neutral ammonium citrate solution) 



in mixed fertilizers 2. 2. 



Potash. 



As sulfate free from chlorides 5.25 5. 



As muriate (chloride) 4.25 4. 



As carbonate 8. 8. 



In cottonseed meal, castor pomace, linseed 



meal, etc 5 . 5 . 



RAW PRODUCTS AND CHEMICALS. 



Fifty-two samples of ground bone, represented by 35 

 Ground Bone, analyses, have been inspected during the season. The 

 average retail cash price for ground bone has been 

 $33.11 and the average calculated commercial valuation $31.23 per 

 ton. Ground bone has averaged 2.97 per cent nitrogen, 76.10 per 

 cent of which has been found active by the alkaline permanganate 

 method. Seven brands were found deficient in nitrogen and 9 in 

 phosphoric acid. Five brands have shown a commercial shortage 

 of over fifty cents per ton. They are as follows: 



American Agricultural Chemical Co., No. 668-958. Nitrogen 

 found 2.19%, guaranteed 2.47%; phosphoric acid found 22.14%, 

 guaranteed 22.88%. No. 616, nitrogen found 2.39%, guaranteed 

 2.47%; phosphoric acid 20.56%, guaranteed 22.88%. 



Coe-Mortimer Co., No. 1121. Nitrogen found 2.66%, guaran- 

 teed 2.47%; phosphoric acid found 17.45%, guaranteed 22.88%. 

 Another sample of this same brand collected in another part of the 

 state at the request of the manufacturer tested well up to the mini- 

 mum guarantee in both constituents. 



The Rogers & Hubbard Co., No. 827. Nitrogen found 3.63%, 

 guaranteed 3.70%; phosphoric acid found 20.79%,guaranteed 22.00%. 



S. Winter Co., No. 843. Nitrogen found 2.28%, guaranteed 

 3.25%; phosphoric acid found 27.71%, guaranteed 24.15%. 



* Fine bone and tankage are separated from coarse bone and tankage by means of a sieve 

 having circular openings 1-50 of an inch in diameter. Valuations of bone and tankage are based 

 upon degree of fineness as well as upon composition. 



** Dissolved by a neutral solution of ammonium citrate, sp. gr. 1.09, in accordance with 

 method adopted by the Association of Official Agricultural Chemists. 



