Mr. Cadigan. Both. In the room I am in you can go over to the window for natural light and use ceiling light for artificial light which has a little different property than the outside light.
Mr. Dulles. Yes.
Mr. Cadigan. I looked at the papers under various lighting conditions——
Mr. Eisenberg. Excuse me a minute, Mr. Cadigan, by "transmitted light" you mean the light transmitted when you hold the object between the light source and your own eyes?
Mr. Cadigan. Yes; then I put it under the microscope, and again looked at it from the standpoint of the surface, paper structure, the color, any imperfections. I further noted that on both of the tapes——
Mr. Eisenberg. 142 is the paper bag.
Mr. Cadigan. On 142 and on the tape on 677 there were a series of marks right down about the center of the tape.
Mr. Eisenberg. Can you see those visually with the unaided eye, or only under a microscope?
Mr. Cadigan. I can see them visually. The microscope makes it look clearer.
Mr. Dulles. What are you pointing to now?