Differential cross sections for electrons scattered inelastically from hydrogen were measured at 18’, 26’, and 34’. The range of incident energy was 4.5 to 18 GeV, and the range of four momentum transfer squared was 1.5 to 21 (GeV/c)2. With the use of these data in conjunction with previously measured data at 6 ’ and loo, the con-tributions from the longitudinal and transverse components of the exchanged photon have been separately determined. The values of the ratio of the photoabsorption cross sections aS/uT were in the range 0 to 0.5. (Submitted to Phys. Rev. Letters.