1. Introduction

2. Observations and Data Reduction
2.1. Target Selection
2.2. Carbon Star Models
2.3. PTI Observations
2.4. Visibility and Uniform Disk Angular Sizes
2.5. Limb Darkened Angular Sizes
2.6. Variability of Angular Sizes

3. Effective Temperatures

4. Discussion
4.1. Comparison to Yamashita (1972, 1975b) Spectral Types
4.2. Comparison to Bergeat et al. (2001, 2002b)
4.3. Reference Angular Diameters
4.4. Dependency of T_OFF on V_0-K_0
4.5. Departures from Spherical Symmetry

5. Conclusion