Composition and Value of Guano. 209 



Table 7. — Angamos Guano. 



Number of Specimen .... 



48 



49 



50 



51 



Organic Matter and Ammonia Salts 



16*29 

 3-29 

 58*84 

 14*69 

 6-89 



10-93) 

 1-56/ 

 51-45 

 23-04 

 13-02 



15-00 



59-00 

 22-00 

 4-00 



15-00 



62-50 

 18-50 

 4-00 





100-00 



100-00 



100-00 



100-00 



Ammonia from 100 parts . . 



20-07 



20-79 



20-89 



20-40 



The Specimens 50 and 51 were analyzed by Dr. Ure. Speci- 

 men 49 was purchased by the person who placed it in my hands 

 for analysis in the ordinary way of business from a country dealer. 

 I have no knowledge of its history ; but as it closely corresponds 

 with the other samples of Angamos guano, I have ventured to 

 place it side by side with them. 



At the same time it is obvious that the difference between this 

 kind of guano and the best specimens of Peruvian is very trifling, 

 since there are in the Tables several cases in which the proportion 

 of ammonia approaches 19 per cent. 



W e now proceed to the other and inferior varieties, taking them 

 in the order of ammoniacal value. The Ichaboe guano, therefore, 

 naturally presents itself first on the list. 



Under this head I can offer no results of my own. The analyses 

 given below were made by Dr. Ure and Mr. Teschemacher. 



Table 8. — Ichaboe Guano. 



Number of Specimen 



48 



49 



50 



51 



52 



53 



54 



55 



56 





58 



























Name of the Ship . 



airy 

 ueen." 



ft 



to 

 o 



alvina. 



!ean." 



alvina' 

 plicate 



leaner. 



in press 



nobia.' 



:vern." 



ereid." 







O) 



O 



3 



O 





O 



Ed 



N 



39 



% 



























Water 



29-5 



29-5 



26-5 



26-5 



— 

 27-0 



26-5 



29-5 





24-8 







Animal Matterand i 

 Ammoniacal Salts / 



20-0 



33-5 



41-0 



36-5 



42-0 



36-5 



33-0 



35-0 



34-0 



29-5 



3C-5 



Sand 



7-0 



1-0 



•3 



•5 



-5 



•5 



1-0 



•o 



' 3 





•« 



Earthy Phosphates . 



37-0 



33-0 



28-7 



27-5 



26-0 



27-5 



29-5 



29-5 



30-0 



35*5 



29 5 



- 

























9-5 



8-T3 







7-5 



8-0 



7-0 



7-3 



8-0 



5-2 



7-7 



The relation in composition between the Peruvian and Ichaboe 

 guanos is at once seen : with less than half the proportion of am- 

 monia, the latter contains a slightly increased quantity of earthy 

 phosphate. That the last-named advantage can in no way com- 

 pensate for a deficiency in ammonia will be better seen when the re- 

 lative value of these ingredients is ascertained. Of the ammonia — 



vol. x. p 



