CHEMICAL DEPAETMENT. 



43 



UNITS TO BE USED IN DETERMINING THE COMMERCIAL 



VALUE OF MANURES. 



Terms— CASK within THREE MONTHS, including Bags gross weiglil^not including Carriage. 



N.B.— These units are based on the present MARIvET PRICES, at such ports as LEITH or 

 GLASGOW. When these unit.s are multiplied by the percentages guaranteed or found 

 in any manure, they will produce a value representing the price at which one SINGLE 

 TON may be bought. 



For Season 1SS8. 



CLASSIFICATION OF MANURES. 



Peruvian Guano, 



1 



(a) 5 per cent. Ammonia or upwards. (&) Below 5 per 



cent. Ammonia. 

 "Fortified," "standardised," or "prepared" Guano, is 



Peruvian Guano to which Sulphate of Ammonia has 



Ijeen added, and sometimes Phospliates and otlier 



ingredients. 



Frey-Bentos 

 Guanos, 



and 



Fish 3 



Frey-Bentos, also called "Liebig's Meat Guano" and 

 "Meat Meal," varies much in composition. Fish 

 Guano usually contains from 20 to 30 per cent, of > 

 Phosphate, and from 7 to 10 per cent, of Ammonia. 



Bones, 



(a) 90 per cent, passing 3 incli sieve. (&) 90 per cent, pass- 

 ing i inch sieve, (c) Coarser. 



Genuine Bone Meal contains from 45 per cent, to 55 per 

 cent. Phosphates, and from 4 per cent, to 5 per cent. 

 Ammonia. 



If Phosphates are high Ammonia is low, and vice versa. 



Steamed Bone Flour, 



Bones degelatinised and ground to flour containing about 

 60 per cent. Phospliates, and about 2 per cent. 

 Ammonia. 



Pure Vitriolated Bones, 



Containing nothing but Natural or Steamed Bones and 

 Sulphuric Acid. 



Superphosphates, 



(a) Containing not less than 30 per cent. Dissolved Phos- 

 phates. 

 (6) Containing less than 30 per cent. Dissolved Phosphates. 



Dissolved Compounds, 



Including Ordinary "Dissolved Bones" and all Special 

 Manures consisting of ingredients dissolved together. 



The "Average" units should lie used in valuing manures 

 of this kind for Associations, unless where the chemist 

 is able to certify whetlier the sources are liigh or low 

 class. 



Mixtures, 



To be valued according to the unit values (as given above) 

 of the ingredients of which they are guaranteed a7id 

 also found to be composed. 



Local Analytical Associations receiving grants from tire Society must not use other 

 units than these in valuing manures. 



