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Article Contents

TITLE PAGE

1.INTRODUCTION

2.INTERSTELLAR EXTINCTION

2.1. Continuous Extinction

2.1.1.Optical Ultraviolet Extinction of Diffuse Dust and Outer-Cloud Dust

2.1.2.The 2175-Å ``Bump''

2.1.3.NIR Continuous Extinction

2.2. The 9.7- and 18-µm Silicate Features

2.3. Mean Extinction Laws

3. EMISSION FROM DUST

3.1. The Unidentified Infrared Bands

3.2. Continuum Emission

4. SCATTERING FROM DUST

5.POLARIZATION

5.1. Continuum Polarization

5.2. Polarization in Spectral Features