TTT- 



a 



Phil. Mag S.5 Vol 33. PI 





. Kg. 2. Fig. 4. Fig. 5. 



Rigid, and lefb Handed Kpo Eighi Banded Spirals Two Wghi Handed Spirals 



Spiral* iji Par,,!!,! in Hrroi'-I,. Un.Huifj on.- in I'.u-aUA . Opptwrng anr 



Opposing one ancOia: another. another. 



COO 



^Jk^JL 



