- Women's measurements
- Big Mac
- Brain membranes
- The Number Three in American Culture
- Nina, Pinta, and the Santa Maria
- Three Furies
- How many triangles?
- Pythagoras - three is the perfect number
- Simon Cowell: You Never Want The People That You Work With To Do Well
- Trinity symbol
- Threes.com featured on the BBC2
- id, ego, superego
- Third Eye - Pineal Gland
- Featured Article - Allen H. Merriam
- Empirical rule - The 68-95-99.7 Rule
- Three Holy sites of Islam
- Periodic Table - Law of Triads
- Three Foil Cross
The brain and medulla spinalis are enclosed within three membranes. These are named from without inward: the dura mater, the arachnoid, and the pia mater.
The dura mater is a thick and dense inelastic membrane. The portion which encloses the brain differs in several essential particulars from that which surrounds the medulla spinalis, and therefore it is necessary to describe them separately; but at the same time it must be distinctly understood that the two form one complete membrane, and are continuous with each other at the foramen magnum.
The rise of the dramas in the thirteenth century, and the rise of the great novels in a later period, together with their frank glorification of love and the joys of life, may be called the Third Renaissance.
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