AORICULTURAL EXPERIMENT STATION. 15 



PARIS GREEN. 



Five samples were examined. 



CCLXXXVI. Strictly pure Paris green. Boston Color Co. 

 Sent by John Watson, Houlton. 



CCLXXXVII. English pure Paris green. Liverpool Paint and 

 Color Co. Sent by John Watson. 



CCLXXXVIII. Strictly pure Paris green. Canada Paint Co. 

 Sent by John Watson. 



CCLXXXIX. Strictly pure Paris green. James I. Blancbard. 

 Purchased from Merrill and Nichols, Orono. 



CCCII. A sample forwarded by Fred S. Wiggin, Maysville 

 Center. The manufacturer's name was not given. 



As the efficiency of Paris green is dependent upon the amount 

 of arsenious acid present, no other ingredient was determined. 



CCLXXXVI, arsenious acid, 54.61 per cent. 



CCLXXXVII, " " 55.39 " " 



CCLXXXVIII, " " 54.70 " " 



CCLXXXIX, " " 55.84 '^ " 



CCCII, " " 40.86 " " 



The amount of arsenious acid in a good Paris green is somewhat 

 variable ranging from 54 to 61 per cent. The three samples sent 

 by Mr. Watson were reported as failing to give satisfactory 

 results, and adulteration was suspected. As will be seen, how- 

 ever, they all proved good. 



SUNDRY ANALYSES. 



CCL. Wood Ashes. From B. W. McKeen. Potash 7.82 per 

 cent. 



CCCXCIV. Marl. From C. Fred Ames, Fort Fairfield. Car- 

 bonate of lime, 83.22 per cent. 



CCCXCV. Soil from J. D. Millikin, Scarboro. Water, 40.65. 

 Nitrogen, 1.45. Potash, 0.14. Phosphoric acid, 0.17 per cent. 



CCCXCVII and CCCXCVIII. Rock . dust. From Maine Red 

 Granite Co., Red Beach, Me. 



CCCXCVII. Potash, 4.31 per cent. Phosphoric acid, 0.41 per 

 cent. 



CCCXCVIII. Potash, 3.18 per cent. Phosphoric acid, 0.19 

 per cent. 



