- Women's measurements
- Big Mac
- Brain membranes
- Nina, Pinta, and the Santa Maria
- The Number Three in American Culture
- Three Furies
- Trinity symbol
- Pythagoras - three is the perfect number
- How many triangles?
- id, ego, superego
- Third Eye - Pineal Gland
- Threes.com featured on the BBC2
- Three Foil Cross
- Simon Cowell: You Never Want The People That You Work With To Do Well
- Three Baskets
- Empirical rule - The 68-95-99.7 Rule
- Three Wise Monkeys
- Bible threes
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.
My writing is a combination of three elements. The first is travel: not travel like a tourist, but travel as exploration. The second is reading literature on the subject. The third is reflection.
|If you have a broadband connection and are using the web browser Internet Explorer, you can view a sabbatical presentation by the author of The Book of Threes. He suggests threes exist simultaneously as simplification, completion and memory. Read more at http://sab.threes.com.|