Viewed through the telescopic sight of the C2766 Mannlicher-Carcano rifle from the sixth-floor window during the test, the marks that simulated the entry wounds on the stand-ins for the President and the Governor were generally in a straight line. That alinement became obvious to the viewer through the scope as the Governor’s model turned slightly to his right and assumed the position which Governor Connally had described as his position when he was struck. Viewing the stand-ins for the President and the Governor in the sight of the C2766 Mannlicher-Carcano rifle at the location depicted in frames 207 and 210, Frazier testified: “They both are in direct alinement with the telescopic sight at the window. The Governor is immediately behind the President in the field of view.”[C3-300] (See Commission Exhibit No. 893, p. 102.) A surveyor then placed his sighting equipment at the precise point of entry on the back of the President’s neck, assuming that the President was struck at frame 210, and measured the angle to the end of the muzzle of the rifle positioned where it was believed to have been held by the assassin.[C3-301] That angle measured 21°34’.[C3-302] From the same points of reference, the angle at frame 225 was measured at 20°11’, giving an average angle of 20°52’30” from frame 210 to frame 225.[C3-303] Allowing for a downward street grade of 3°9’, the probable angle through the President’s body was calculated at 17°43’30”, assuming that he was sitting in a vertical position.[C3-304]