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



TABLE 193. Tartaric Acid; Camphor; Santonin; Santonic 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- 

 stem's " Phys. Chem. Tab." The following symbols are used : 



/ = number grammes of the active substance in 100 grammes of the solution. 



c = solvent " 



q = active " " cubic centimetre " 



Right-handed rotation is marked +, left-handed . 



TABLE 194. -Sodium Chlorate; Quartz. 



* The paper is quoted from a paper by Ketteler in " Wied. Ann." vol. 21, p. 444. The wave-lengths are for 

 the Fraunhofer lines, Angstrom's values for the ultra violet sun, and Cornu's values for the cadmium lines. 



