\th Series, Vol. III. 



Plate VII. 



Axial view of Lenticular Cell containing Blood, Axial view of Conical Cell containg Chlorophyll 

 showing position of Central Line and skewing position of Central Line and 



Spectroscopic Slit. 



Spectroscopic Slit. 



no 3 



SPECTROSCOPIC SLIT. SPECTROSCOPIC SLIT. 



Absorption band with Scale and Moveable Wires in situ to illustrate Method of 



Centering a Primitive Absorption Line 



FIG 1 



A 



MEMOIRS AND PROCEEDINGS, MANCHESTER LIT. AND PHIL SOC. 



