┌—─—─—─—─—─—──────────—─—─—─┬—─—─—─—─—─—────────—─┬—─—─—─—───────—─—─┐ │ │ MORPHIA. │ STRYCHNIA. │ ├—─—─—─—─—─—──────────—─—─—─┼—─—─—─—─—─—────────—─┼—─—─—─—─—───────—─┤ │Concent. H_{2}SO_{4}—cold. │If pure, nothing at │If pure, nothing. │ │ │ first. │Some yellow─brown.│ │ ” ” warmed.│Violet, not strong. │ Do. │ │ To this warmed solution │ │ │ │add:— │ │ │ ├—─—─—─—─—─—─—─—──────────—─┼—─—─—─—─—─—────────—─┼—─—─—─—───────—─—─┤ │ MnO_{2}. │Red, changing slowly │_Deep blue purple_│ │ │ to brown, then │ —tored purple— │ │ │ orange. On dilution,│cherryred—finally │ │ │ yellow─brown. │(changes slow). On│ │ │ │ dilution, rich │ │ │ │ orange red. │ ├—─—─—─—─—─—─—──────────—─—─┼—─—────────—─—─—─—─—─┼—─—─—─—───────—─—─┤ │ K_{6}Cfy_{2}. │Violet, changing to │Same changes, but │ │ │ orange; not strong. │ more rapid and │ │ │ On dilution, at once│ less distinct. On│ │ │ destroyed to │ dilution, at once│ │ │ greenish─yellow │ destroyed to │ │ │ solution, turning │ greenish─yellow │ │ │blue. │ solution. │ ├—─—─—─—─—─—──────────—─—─—─┼—─—─—─—─—─—────────—─┼—─—─—───────—─—─—─┤ │ K_{2}Cr_{2}O_{7}. │Red─brown, │Same as with │ │ │ orange─brown, │ MnO_{2}, but more│ │ │ _green_. │ evanescent and │ │ │ On dilution, │ rapid in change. │ │ │ _green_. │ On dilution, at │ │ │ │ once removed to │ │ │ │ yellowish─brown. │ ├—─—─—─—─—─—─—─—──────────—─┼—─—─—─—────────—─—─—─┼—─—─—───────—─—─—─┤ │ HNO_{3} concent. │_Intense brownish─ │_In the cold, │ │ │ red_, changing │ nothing if pure._│ │ │ to brown— bleached │ On warming, │ │ │ by SnCl_{2}. │ orange─yellow │ │ │ │ —then SnCl_{2} │ │ │ │ _brown_ changing│ │ │ │ with excess to │ │ │ │ yellow. │ └—─—─—─—─—─—──────────—─—─—─┴—─—─—─—────────—─—─—─┴—─—─—─—───────—─—─┘