1 INTRODUCTION

2 OBSERVATION

3 PHOTOMETRIC DIAGRAMS
3.1 Membership Selection
3.2 Reddening and the Reddening Law
3.3 Distance to NGC 1893
3.4 Hertzsprung-Russell Diagram and Age of NGC 1893

4 THE INITIAL MASS FUNCTION

5 MASS ACCRETION RATES OF PMS STARS WITH UV EXCESS

6 TRIGGERED STAR FORMATION IN NGC 1893

7 SUMMARY