+-----------+-----------------+------------------+-------------------+ | Name of |Strong Sulphuric | Fröhde’s Reagent.|Mandelin’s Reagent.| |Substance. | Acid. | | | +-----------+-----------------+------------------+-------------------+ | | | | | |Strychnine.| ... | ... |Violet-blue, then | | | | |lastly cinnabar- | | | | |red. | | | | | | |Brucine. |Pale red. |Red, then yellow. |Yellow-red to | | | | |orange, afterwards | | | | |blood-red. | | | | | | |Curarine. |Fine red. | ... | ... | | | | | | |Quinine. | ... |Greenish. |Weak orange, then | | | | |blue-green, lastly | | | | |green-brown. | | | | | | |Atropine. | ... | ... |Red, then yellow- | | | | |red, and lastly | | | | |yellow. | | | | | | |Aconitine. | ... | ... | ... | | | | | | |Veratrine. |Yellow, then |Gamboge-yellow, |Yellow, orange, | | |orange, blood- |then cherry-red. |blood-red, lastly | | |red, lastly | |carmine-red. | | |carmine-red. | | | | | | | | |Morphine. | ... |Violet, green, |Reddish, then | | | |blue-green, and |blue-violet. | | | |yellow. | | | | | | | |Narcotine. |Yellow, then |Green, then brown-|Cinnabar-red, then | | |raspberry colour.|green, yellow, |carmine-red. | | | |lastly red. | | | | | | | |Codeine. | ... |Dirty green, then |Green-blue to blue.| | | |blue, lastly | | | | |yellow. | |