878 



EXPERIMENT STATION RECORD. 



auiouuted to 69.71 lbs. of vegetable matter, and 26.25 lbs. of vegetable aud animal 

 (mostly animal) matter iiuiiossible to separate, a total of 95.96 lbs. The analyses of 

 these, just as collected, aud the calculated amount for one year, are as follows: 



Composition of table and kitchen wastes. 



\ Total 

 ! amount 

 ' per year. 



I Pounds. 



Vegetable l 1.208.31 



Animal (mostly) 455.00 



Whole product 1, 663. 31 



Ash. 



Organic 

 matter. 



Per ct. 



1.83 

 9.78 

 4.00 



Per ctT 

 13.71 

 31.52 

 18.58 



Nitro- 

 gen. 



Per ct. 



0.30 



1.64 



.67 



Phos- 

 phoric iPotash. 

 acid. 



Per ct. 



0.12 



2.74 



.84 



Per ct. 



0.54 



.30 



.47 



«'[It is calculated that there could] be gathered annually from 20,000 people about 

 2,080 tons of garbage, with an analysis and value c(iual to good barnyard manure. 

 By treating with suitable solvents and drying the residue there could be secured 

 388i tons of fertilizer, worth $14.69 per ton, and over 81 tons of grease, which sells 

 for an average of $70 itev ton wherever this system is in operation. By cremation 

 there would result 83} tons of a.shes, worth $28.53 per ton. . . . 



"The total population of the cities and towns of New Jersey is approximately 

 918,722, and the garbage of this number of people would amount to 95,516 tons per 

 year, from which could be manufactured 17,848 tons of tankage, worth $262,180, and 

 3,726 tons of grease, worth $260,800, a total of $522,980. 



"Should all of this garbage be thus manipulated there would be an increase in the 

 plant-food supply to the extent of 45 per cent of the tonnage of complete fertilizers 

 used in this State during 1894, which could not help but diminish the cost of fertilizers 

 to the agriculturist. 



"Furthermore, there would be the direct saving of an amount of money ($5,000) 

 more than enough to purchase, at $3.50 per unit, all of that costly constituent, 

 ammonia, that those complete fertilizers furnished."' 



Available ^phosphoric acid in ground bone. — Determinations of the cit- 

 rate solubility of phosphoric acid in 23 samples of boues (mostly 

 steamed) and of 8 home mixtures containing- bone are reported. In 

 case of the first the degree of fineness is also given. 



"These studies indicate, first, that on the average more than one- 

 fourth of the phosphoric acid in bone is in an available formj and 

 second, that both mechanical condition and physical structure are 

 factors which influence availability; as a rule, the finer and softer the 

 bone the greater the degree of availability." 



Examinations were made of 2 samples of bone unmixed and mixed 

 with sand in different proportions with the following results: 



Available phosplioric acid in different mixtures of bone. 



Steamed bone 



Percentage of total phosphoric acid available. 

 Button bone 



Percentage of total pho.sphoric acid available. 



Total 

 phos- 

 phoric 

 acid. 



Per cent. 

 26.92 



Available phosphoric acid. 



Mixture 

 1 (0.5 gm. 



bone, 

 1.5 gm. 



sand). 



Per cent. 

 13.76 

 51.10 

 10.14 

 39.90 



Mixture Mixture 

 2 (1 gra. 3(1. 5gm. 



bone, 

 1 gm. 

 sand). 



Per cent. 

 13.06 

 48.50 



hone, 

 0. 5 gm . 

 sand). 



Per cent. 



12.15 



45.10 



7.60 



27.70 



Pure 



bone 



(2gm.). 



Per cent. 

 10.11 

 37.60 

 6.41 

 25.30 



