The red corpuscles are circular disks about 1/3200 of an inch in diameter, and double concave in shape.

The parallel is now plain to the reader: the corpuscle is the Yogi, bent on liberation: the heat which warms him is the Divine Love, centered in his heart, his initiations are the successive emancipations into higher and higher spaces, till he attains Nirvanainherits the kingdom prepared for him from the foundation of the world.

These rods and cones are to be regarded as the peculiar modes of termination of the nerve filaments of the eye, just as the taste buds are the modes of termination of the nerve of taste in the tongue, and just as the touch corpuscles are the terminations of the nerves in the skin.