Alpha particle and proton measurements in the solar wind made using the SWE Faraday cup detectors on the WIND spacecraft are reported. Some overall trends observed confirm past observations: the ratios of alpha particle to proton density N&agr;/NP, thermal speed W&agr;/WP, as well as the differential velocity V&agr;-VP (hereafter V&agr;P) are general correlated with bulk solar wind flow speed. The detailed WIND measurements enable us to investigate instances when the alpha-proton differences deviate from these overall general trends. Occasionally, difference velocities as large as 80 km/s were seen, with the ratio of |V&agr;P| to the Alfv¿n speed VA near unity, characteristics more typical of observations at solar distances less than 1 AU. An example is presented where |V&agr;|-|VP| reverses sign while |V&agr;P| stays nearly constant. Comparison of the vector velocities and the magnetic field suggests that the speed reversal is associated with a localized kink in the magnetic field. Finally we show an instance where |V&agr;P| exceeds the observed wave speed for Alfv¿nic fluctuations (Vwave=B0ΔV/ΔB) resulting in alpha particle velocity fluctuations that anti-correlate with the wave. Though this phenomenon has been previously reported in high-latitude measurements beyond 1 AU, it is shown here to also occur at 1 AU in the ecliptic. ¿ American Geophysical Union 1996