Fig. 2. Interference patterns formed by natural light underwater at 30 m depth (station 8). The 

 analyzer and camera were directed horizontally in azimuths of (A) 0\ (B) 90 , (C) 180 , and (D) 270° 

 relative to the sun's bearing. The scattered sunlight is seen to be linearly polarized in all cases, with 

 the polarization apparently weakest at (A) and stronger particularly at 90 (B) and 270 (D). 

 The planes of polarization (angles between plane of light vibration relative to the horizontal) measured 

 in uncropped prints where the film frames provide the vertical and horizontal references were: 

 {A) 8-5" tilt toward the right, (B) 42-5' left, (C) 4 right and (D) 43' right. Exposures: ^> sec, f/4, 



Tri-X film. Sun's altitude 26°. 



