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SCIENTIFIC AND APPLIED PHARMACOGNOSY 



FIG. 222. Strychnine sulphate: tetragonal crystals from aqueous solution, in 

 ordinary light, showing basal and side aspects. 



FIG. 223. Strychnine sulphate: tetragonal crystals from aqueous solution, 

 showing basal aspect in polarized light. Also one large crystal of a second 

 form (orthorhombic?) of strychnine sulphate. 



