Category: Science - Physics
§ 1. My subject this evening is not the physical properties of crystals, not even their dynamics; it is merely the geometry of the structure--the arrangement of the molecules in the constitution of a crystal. Every crystal is a homogeneous assemblage of small bodies or molecul...
§ 18. For the division of continuous three-dimensional space[5] into equal, similar, and similarly oriented cells, quite a corresponding transformation from partitioning by thre...
1. Part 1§ 1. My subject this evening is not the physical properties of crystals, not even their dynamics; it is merely the geometry of the structure--the arrangement of the molecules in...
3. Part 3Consider a solid _S_{1}_ and the twelve neighbours which touch it, and try if it is possible to cause it to touch more than twelve of the bodies. Attach ends of three thick flex...
4. Part 4§ 48. Make an equilateral equiangular hexagonal prism, with its diagonal from edge to edge ninety-five hundredths[17] of its length. Place a number of these close together, so a...