160 



EXPEIilMEXTAL FABMS 



7-8 EDWARD VII., A. 1908 



Leaving out of consideration the value of the phosphates in the ash and that of 

 the oil present, the liquor should be worth saving for its nitrogen, which amounts 

 to approximately Si lbs. per ton. 



Fish-scrap from Shippigan, N.B. 



Three samples of fish-scrap were received on December 12, 1906, from the Dog- 

 fish Reduction Works, Shippigan, N.B., marked as follows : — 

 ISTo. 1. Dry, mixed dog-fish and offal. 

 No. 2. Pure dog-fish scrap. 

 Xo. 3. Oily, mixed dog-fish and offal. 



Analysis. 



No. 1. Xo. 2. No. 3. 



Moisture 3-12 4-81 4-27 



Nitrogen 8-13 9-41 8-13 



Phosphoric acid 6-49 3-77 3-97 



Total mineral matter 17-38 10-29 10-51 



Mineral matter insoluble in acid 



(sand, &c.) -51 -67 -30 



Oil 25-38 22-81 31-77 



These have all been well dried, the percentage of water being decidedly lower 

 than in the samples previously examined. This, naturally, would tend to increase the 

 percentages of the other constituents, including those of fertilizing value, nitrogen 

 and phosphoric acid. 



The nitrogen-content of Nos. 1 and 3 is the same, and slightly higher than that 

 of the dog-fish scrap from Canso reported on in December, 1905. The proportion of 

 nitrogen in No. 2 exceeds that of No. 1 and No. 3 by about l-l per cent and must be 

 considered as extremely satisfactory. 



The phosphoric acid, it will bo noted, in Nos. 2 and 3 lies .between 35 and 4 per 

 cent. This is almost 1 per cent higher than found in the former samjiles of dog-fish 

 scrap. No. 1 contains practically 6^ per cent phosphoric acid, decidedly more than 

 the other samples. This, I presume, is due to the presence of bones from other fish 

 in this sample — a conjecture which received confirmation from the much larger per- 

 centage of mineral matter (chiefly bone) it contains. 



All are notably free from sand and other inert matter of similar character. 



The data indicate a large amount of oil in this dog-fish scrap, though in this 

 respect Nos. 1 and 2 show a distinct improvement on similar scraps from Canso, 

 analysed in December, 1905, the reduction of this constituent being from 6 per cent 

 to 10 per cent. No. 3 contains practically the same percentage of oil as the samples 

 of 1905. 



The l^se of Fish-scrap on the Farm. 



The following fbrmulae are offered to meet inquiries respecting the use of this 

 dog-fish scrap. Necessarily they cannot be regarded as giving the best proportions 

 for all classes of land, but they will be helpful to those who have had no experience 

 in the home-mixing of fei-tilizers." They would result in a complete fertilizer, i.e., 

 one furnishing all three of the essential elements of fertility, and such a fertilizer 

 has been found in a large num.ber of instances the most profitable to use. 



* Farmers intending to use this fertilizer are invited to correspond with this Division, 

 stating the nature of their soil and its history as regards recent manuring and cropping. Ad- 

 Tice M'Jil then be given as to mixtures that will probably prove useful. 



