Tables 193, 194. ROTATION OF PLANE OF POLARIZED LIGHT. 197 



TABLE 193. — Tartaric Acid; Camphor; Santonin; Santonlc Acid; Cane Sugar. 



A few examples are here given showing the effect of wave-length on the rotation of the plane of polarization. The 

 rotations are for a thickness of one decimetre of the solution. The examples are quoted from Landolt & Born- 

 steiu's " Phys. Chem. Tab." The loUowing symbols are used : — 



/r= number grammes of the active substance in too grammes of the solution. 

 c= " " solvent " " " " 



? = " " active " " cubic centimetre " 



Right-handed rotation is marked -f-, left-handed — . 



TABLE 194. — Sodium Cblorate; Quartz. 



