1 INTRODUCTION  
2 THE PHOTOMETRIC AND ASTROMETRIC SAMPLE  
3 CROSS-MATCH WITH PREVIOUS SURVEYS  
4 NEW STELLAR AND SUBSTELLAR MEMBERS IN THE PRAESEPE  
5 ESTIMATION OF CONTAMINATION  
6 DISCUSSION ON THE BINARY FREQUENCY  
7 VARIABILITY AT 600 MYR  
8 LUMINOSITY AND MASS FUNCTION  
9 SUMMARY AND CONCLUSIONS