﻿Quarterly Abstract of European Chemistry. 



183 



coating of urate of ammonia which adheres so firmly to the seams of 

 the clay, serve to strengthen Mr. Francis in his belief that the guano 

 could not have been deposited by the birds as it now occurs, but that 

 water must have acted some part in the formation of this deposit. In 

 conclusion it is stated that from the existence of so much ready formed 

 ammonia in the African guano, it would be extremely stimulating to 

 vegetation at first, but that its power would soon be lost unless it was 

 previously mixed with something to fix the ammonia, as gypsum or 

 charcoal ; on the contrary the species containing the uric acid, from 

 its slow decomposition, would be a constant source of nitrogen propor- 

 tionate to the growth of the plant. 



J. Denham Smith has communicated a very interesting article to the 

 Chemical Society upon the subject of the South American guano. 

 (Chem. Soc. Mem. Vol. II, 140.) All that can be introduced here is a 

 tabular view of his minute analyses. 



S3 



o 



c 







% 



as 



9 



I 



q 



Water, 



Muriate of ammonia, 

 Sulphate of potash, 

 Sulphate of soda, 

 Oxalate of ammonia, 

 Oxalate of soda, 

 Phosphate of ammonia, 

 Phosphate of lime, 

 Phosphate of potash, 

 Phosphate of soda, 

 Chloride of potassium, 

 Chloride of sodium, 

 I Organic matter, 

 Urate of ammonia, 

 Uric acid, 

 Phosph. amm. and mag. 



Phosphate of soda, 



Phosphate of lime, 

 [Organic matter, 

 f Oxalate of lime, 



Phosphate of lime, 



Phosphate of magnesia, 



Humus, 



Organic matter, 



Water, 



Sand, &c. 



Oxide iron and alumina, 



Loss, &c. 



1. 



222 00 

 25-50 

 80 00 



trace 

 7400 



2. 



3. 



4. 



5. 



21500 

 35-22 



37-90 



100-38 



204-20 106-66 "77-00 



4-43 30-30 



63-30 3006 



12-56 

 20 02 

 35-82 



259-44 12-23 191-77 

 93-90 



105-63 

 61-24! trace 





77-32 14-94 



1500 

 15418 



2516 

 5-64 

 1-20 

 1-86 



1118 



25-60 

 197-50 



20-30 



25-36 

 34-56 

 15-60 



6174 

 2512 



0-44 



404 



1-28 



2-88 



6-38 



107-26 



19200 



19-84 



20-60 



11-40 



42 -42 



16-48 



29-22 

 6-68 



9-50 

 2-40 



7-84! 



trace 

 11-37 

 1000 



1-50 



8-60 

 109-58 



62-701 664-47 

 8-74 30-56 



49-47 



3-60 



41-63 



286-31 

 25-53 



1-33 



110 

 7-56 



8-62 



29-73 



49-74 80-60 

 7 20i 20-43 



13113 



25-80 



18-36 



4-20 

 1-50 



4-98 



2-68 



1000-001100000 1000-00, 1000-00 1002-22 



Nos. 1 and 2 were in the state of powder ; 3, 4, and 5 were of the 

 concrete variety. 



