Structural and Magneto-optic Rotation. 



427 



Table V. 

 Sodium chlorate from saturated solution by spontaneous evaporation. 

 Crystals by Excess by 



No. Wt '"No. Wt. % of Dextro. Remarks. 



j Dextro.. 41 0-870 7 037 



/ Laevo .. 34 O'oOO ._ .. 63-5 



j Dextro.. ]8 0'546 



\ Laevo.. 24 0-630 6 0*084 46*4 All clear and large. 



(Dextro.. 30 1-306 .. 0-130 Uncertain = 0-130 



} Laevo .. 30 1*176 .. .. 52-6 grm. 



( Dextro.. 4 0-285 .. 0-183 



\ Laevo .. 7 0102 3 .. 73-6 



} Dextro.. 10 0-612 .. .. Uncertain 0-025 



( Laevo.. 18 1-127 8 0-515 35'2 grm. 



Resultant rotation . = —40 27-7 ) After evaporating 



" " +0-6 53-3 [-to dryness (spon- 



" " —06 46-7 ) taneous). 



" " —1-4 42-2 



Conclusion. 



The results obtained from these experiments show no 

 marked and indisputable evidence of the influence of the 

 magnetic field upon optically active structure. However, a 

 review of the results seems to indicate a disturbance of the 

 equilibrium by the magnetic field which results in a rather 

 greater variation from the neutral crop of sodium chlorate 

 crystals than is ordinarily obtained, but without revealing any 

 definite influence in regard to the direction of the resultant 

 rotation. 



It might appear that a force however feeble should be suffi- 

 cient to exert a directive action upon the substance during the 

 period of formation, which, if true, gives the results pre- 

 viously discussed the greater weight, since even the strongest 

 magnetic fields employed have failed to control the direction 

 of the resultant activity. 



Sloane Physical Laboratory, Yale University, 

 June 1, 1898. 



