Annu. Rev. Astron. Astrophys. 1978. 16: 103-39 Copyright © 1978 by Annual Reviews. All rights reserved

Reprinted with kind permission from Annual Reviews, 4139 El Camino Way, Palo Alto, California, USA

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Table of Contents

• INTRODUCTION
• MEASUREMENT OF THE DISTRIBUTION AND KINEMATICS OF THE GAS
• Methods of Observation
• Distribution of the Gas
• Velocity Fields
• THE GENERAL ROTATION
• Rotation Curve Shape and Galaxy Morphological Type
• Rotation Curves in the Outer Parts of Spiral Galaxies
• Velocity Dispersion Measurements
• NONCIRCULAR MOTIONS
• The Central Regions
• Large-Scale Effects of Nuclear Activity
• Bars and Oval Distortions
• Density Wave Streaming
• Warps in the Outer Parts of Spiral Galaxies
• Kinematical Effects of Tidal Interactions
• CONCLUDING REMARKS
• REFERENCES