| 1.
| structure and properties of crystals
|
|
|
| 2.
| heart with its functions and diseases
|
|
|
| 3.
| secret writings
|
|
|
| 4.
| production and application of low temperatures
|
|
|
| 5.
| sound
|
|
|
| 6.
| relation of living forms to the surroundings
|
|
|
| 7.
| antiquities
|
|
|
| 8.
| moral principles
|
|
|
| 9.
| structure and functions of cells
|
|
|
| 10.
| supply and demand of goods and services
|
|
|
