CHAP. XYIII. COMBINATIONS OF FISH MANURE. 313 



' I have examined two specimens of manure prepared 

 by Mr. Bruce from the fish commonly known as the 

 menhadden (Alosa menhadden}. No. 1 was made with 

 the Port Daniel shale, as before described ; while for No. 

 2 this was replaced by a mixture of clay and sawdust, 

 which was distilled like the shale, the volatile products 

 being added to the decomposing fish. The oil which rose 

 to the surface of the liquid mass had been separated from 

 the second preparation but remained mingled with the 

 first. Both of these specimens were in the form of a 

 black granular mass, moist, cohering under pressure, and 



having a very fishy odour. 



1 2 



Animal matters and carbon . . . 23-7 1 01 A 



Oil 6-6 / 21 ' 



Water 13-5 21-8 



Earthy matters 50-2 57-2 



100-0 100-0 



ANALYSIS OF THE EARTHY MATTERS. 



Phosphoric acid 340 3-99 



Sulphuric acid 2-10 -15 



Lime 5-90 444 



Magnesia 1-20 1-15 



Ammonia 3-76 2-60 



' If we calculate the value of the first specimen accord- 

 ing to the rules given below,* we have as follows for 100 

 pounds : 



* Attempts have been made to fix the money value of the ammonia and 

 the phosphates in manures, and thus to enable us, from the results of analysis, 

 to estimate the value of any fertiliser containing: these elements. This was 

 I believe first suggested a few years since, by an eminent agricultural chemist 

 of Saxony, Dr. Stockhardt, and has been adopted by the scientific agricul- 

 turists of Great Britain, France, and the United States. These values vary 

 of course veiy much for different countries; but I shall avail myself of the 



