246 Experiments on the Sanguinaria canadensis. 



2. Solution of chloride of gold produces a brown-colored 

 precipitate, in which the gold is reduced to the metallic state. 



3. Solution of deuto-chloride of mercury affords two dis- 

 tinct precipitates ; one of a brick-red color, the other of a 

 dark brownish-red hue. 



4. Solution of proto-chloride of tin, produces a light flesh- 

 red precipitate ; 



5. Solution of per-chloride of iron, a brown precipitate ; 



6. Solution of binacetate of lead, a light clay-colored pre- 

 cipitate ; 



7. Solution of nitrate of silver, a dark brown precipitate; 



8. Solution of per-sulphate of iron, a reddish brown pre- 

 cipitate ; and, 



9. Tincture of iodine produces a precipitate ; but 



10. The watery solution of iodine produces none, but a 

 change only of color. 



1 1. The infusion of the root in cold water, gave the same 

 results with the above-named tests, and afforded also a pre- 

 cipitate with solution of silicated potash. 



12. Water distilled from the recent root, has a slight em- 

 pyreumatic odor, and nauseous taste. 



13. A very dilute solution of carbonate of potash boiled 

 on the root, acquired a fine tint of reddish brown : an acid 

 dropped into it, caused the whole to become gelatinous. 



14. Alcohol digested on the recent root, acquires a slight 

 color : when this solution is poured into cold water, a milky 

 fluid is the result. 



15. Sulphuric ether digested on the dry powdered root, 

 acquires, after a few hours, a yellowish color, and leaves a 

 reddish brown matter undissolved. The etherial solution, 

 when evaporated, leaves a resinous matter of a brown red 

 color, slightly adhesive, and of a very acrid taste. 



16. Pure dilute acetic acid digested on the root, acquires 

 a bright red color, having an acrid taste like that of the root. 

 The acetic solution, evaporated to dryness, leaves a red-co- 



