Composition and Value of Guano. 203 



Table 3. — Peruvian Guano. 



Numberof Specimen 



10 



11 



12 



13 



14 



16 



17 



18 



_L 9 _ 



_f!L 



Organic Matter and \ 

 Salts of Ammonia ) 



Earthy Phosphates . 

 Alkaline Salts . . . 



14-61 



51-38 



1-68 

 23-86 

 8-47 



10-13 



58*07 



1-31 

 21*16 

 9-33 



21-87 



48-72 



1*01 

 21-09 

 7-31 



23-74 



47-35 



I'll 

 19-80 

 7-80 



18-33 



51-24 



1-31 

 21-79 

 7-33 



16-88 

 54 81 



1-12 



21-75 

 5-44 



13 09 



53-32 



1-42 

 26 29 

 5-88 



11*24 



55-17 



1-46 

 27 89 

 4-24 



19-79 



52-53 



2-61 

 24-08 

 •99 



9 76 



48-54 



1-83 

 28*02 

 11-85 





100*00 



100-00 100-00 



100-00 



100-00 ioo-oo 



100-00 



100 00 IOj'oO 



ioo-oo 



Ammonia yielded 1 

 by 100 parts of j 

 each Specimen . ' 



16-18 



18-66 



] 4 • 04 



15*51 



16-60 



16-81 



17-06 



18-27 



Not 

 ascer- 

 tained 



17*55 



The next analyses are those of samples sold to different persons 

 as good Peruvian guanos, but which are so low in ammoniacal 

 composition as to lead to a doubt of their genuineness : — 



Table 4. — Infeiior Guanos. 





Number of Specimen . ... 



21 



22 



23 







Organic Matter aud Salts of x\mmonia 



19-74 

 46-17 

 2-46 

 31-59 

 •04 



11- 29 

 46-45 



2-63 

 26-71 



12- 92 



11 •22 

 34-68 

 5-44 

 21-09 

 25-71 









100-10 



100-00 



100 00 







Ammonia yielded by 100 parts. 



11-89 



10-41 



8-12* 





The large proportion of "'alkaline salts" in the third speci- 

 men is due to the presence of a quantity of gypsum and common 

 salt with which the guano has been adulterated, whilst at the 

 same time the proportion of earthy phosphates has been kept up 

 probably by the mixture of a certain quantity of one of the 

 cheaper varieties of guano. 



The next specimens are from the importations of the latter 

 part of 1348 and the beginning of the present year (1849). 



The first 8 of the following table were taken from the ware- 

 housed cargoes by Mr. Lav.es. Nos. 29 and SI are duplicate 

 specimens of Nos. 28 and 30. 



* The result of two analyses closely agreeing:, 



