1. INTRODUCTION  
2. OBSERVATIONS  
2.1. Data Acquisition and Reduction Techniques  
2.2. CO Contamination  
3. RESULTS AND ANALYSIS  
3.1. Magnetic Field Morphology  
3.2. Polarization Efficiency  
3.3. Polarization Efficiency–A V Dependence  
3.4. Orientation of Clumps and Magnetic Fields  
3.5. Magnetic Field Strength in IC5146  
3.6. Gravitational Stability of Clumps  
4.1. The Origin of the Core-Scale HFS  
4.2. The Alignment between Local Magnetic Fields and Clumps  
5. CONCLUSIONS