428 



PHOTOMECHANICAL CONSIDERATIONS 



Fig. 5. Sedimentation coefficients S20,w calculated from four measure- 

 ments of sedimentation velocity at different starting concentrations. The 

 straight line was fitted to the data by the method of least squares. 



Fig. 6. Rayleigh interference patterns at equilibrium for relative initial con- 

 centrations of 1.0, 0.5, and 0.25 (left to right). Rotor speed 20,410 rpm, t -- 

 17.4°C, AgoO = 6.0 cm-1 for highest initial concentration. 



