EXPERIMENT STATION. 31 



V5 samples of this class of fertilizers have been analyzed during 

 the year, 1 of them for private parties. The analyses and valua- 

 tions of 63 of them are given on pages 33 to 38. 



34 are called by the 'manufacturers'" phosphate" or "super- 

 phosphate;" 10, "Fish and Potash;" 4, "Mineral Manure;" 

 3, "Peruvian Guano;" 3, "Complete Manure," and 2, "Com- 

 mon Sense Fertilizer." The other 12 are "Alkalized Guano," 

 "Menhaden Guano," "Fish Guano," "Sea Fowl Guano," " Blood 

 Guano," "Soluble Pacific Guano," " Animal Fertilizer," "Pelican 

 Bone Fertilizer," " Farmer's Friend Fertilizer," " Bay State Fer- 

 tilizer" and "Great Planet A." 



On page 38 are given the analyses of 5 superphosphates, whose 

 retail prices were not reported. For that reason the analyses 

 could not be arrang-ed with reference to the relation of cost to 

 estimated value as the others have been. 



Chlorine has been determined in most cases in order to decide 

 whether the potash in the fertilizer exists as muriate or sulphate. 

 Potash is in all cases reckoned as muriate if sufficient chlorine is 

 present in the fertilizer to combine with it. If there is more pot- 

 ash present than will combine with the chlorine, then this excess 

 of potash is reckoned as sulphate. , 



998 " Alkalized Guano " is stated by the manufacturers to be 

 an artificial guano made of ammonia salts, sulphate of potash and 

 phosphoric acid " from organic sources." That portion of the 

 guano which is insoluble in water has much the appearance of 

 the phosphates that come from the West Indies, Cura9ao, Mona 

 Island, etc. 



863 Chittenden's Fish and Potash is made from fish scrap 

 which has not been acidulated. For that reason, only nitrogen 

 and total phosphoric acid were determined at the time when the 

 •sample came, and the results were published in Bulletin No. 73, 

 p. 13. The valuation then given was 125.20. For comparison 

 with other brands of fish and potash it was necessary to sepa- 

 rately determine phosphoric acid in the three forms and to change 

 the valuation accordingly, which has been done in the table on 

 page 37. 



855, 856, 875 and 948 are samples of Paul Thompson's Min- 

 eral Manure for Tobacco and Other Crops. 856 was sampled 

 and sent by W. A. Burr, West Hartford. The others were sam- 

 pled by the manufacturer and thestation agent. The analyse^ indi- 

 cate a series of unsuccessful experiments in manufacture, and not 

 a marketable article of tolerably uniform composition. 



