1 INTRODUCTION

2 A THEORETICAL GALACTIC MODEL SAMPLE

3 THE OBSERVATIONAL WHITE DWARF SAMPLE

4 SPACE DENSITIES AND BIRTH RATES: METHOD

5 RESULTS

6 COMPLETENESS OF THE OBSERVED SAMPLE

7 DERIVATION OF THE SPACE NUMBER DENSITY OF DA WHITE DWARFS FROM UVEX

8 BIRTH RATE OF DA WHITE DWARFS IN THE GALACTIC PLANE

9 DISCUSSION AND CONCLUSIONS