We present a measurement of low-mass lepton pair production in the central region of p-pbar collisions with the Collider Detector at Fermilab at root-s = 1.8 TeV. We study dileptons in the invariant mass range 11 < M < 150 GeV, within the rapidity range |y|<1. The differential cross-sections are measured separately for electron and muon pairs, and the results are compared in order to investigate a possible difference between the electron and muon channels in the previous CDF result. This measurement has a much higher precision than the previous measurement due to increased luminosity: 85.37 pb^{-1} (2651 events) in the electron channel and 83.68~pb^{-1} (2062 events) in the muon channel. Posted to /cdf/pub/thesis/cdf5231_ascott_thesis.ps http://www-cdf.fnal.gov/thesis/cdf5231_ascott_thesis.ps Posted by saltzbrg@cdfsga