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JOURNAL OF THE 



D. Ammoniated guano with an extremely high per cent, of Insol- 

 uble Phosphoric Acid. 



E. Ammoniated guano — in the 20 mesh sample illustrating in a 

 marked degree what has been before stated concerning the settling 

 of the finer particles. 



TABLE I. 



We see at once several noteworthy results attended with the pul- 

 verization, viz : the loss of water, and the decrease of the Insoluble 

 PoOg ; the reason for the former is obvious; the latter is due to the 

 greater solvent action of the ammonium citrate used in its determi- 

 nation on the finer particles caused by the pulverization. The loss 

 of moisture has the effect of increasing the content of the other 

 substances — a mere withdrawal of water, of course, raising other 

 constituents — which is the case with the total P0O5, total Potash, 

 &c., and would be so with the insoluble P2O5 were it not for the 

 easier solution of the finer than the coarser particles. This decrease 

 of Insol. PoO 5 is enough to counteract the increase caused by the 

 loss of water and cause a still further decrease amounting in ex- 

 treme cases to nearly 25 per cent, of the total amount of Insol. 

 PgOj present in the original sample. 



