A FURTHER CONTRIBUTION TO THE STUDY OF 

 RIGHT^ AND LEFT-HANDEDNESS. 



By R. H. COMPTON. 



In a paper presented to the Cambridge Philosophical Society in 

 June 1910' I discussed the phenomena connected with the occurrence 

 of two stereo-isomeric forms of seedling in two-rowed Barley {Hordenm 

 distichum) ; the difference between them being shown in the mode of 

 folding of the first leaf above the coleoptile (Diagram 1). The two 



LEAF 



COUEOP- 

 riL.£ " 



Diagram 1. 



kinds of fold were called respectively right- and left-handed, the con- 

 vention adopted being explained in the introduction to the paper. 



' K. H. Compton, " On Eight- and Left-Handedneas in Barley," Froc. Camhridge Phil. 

 Soc. XV. p. 495, 1910. 



