The energy spectrum of Telescope Array's Middle Drum detector and the direct comparison to the High Resolution Fly's Eye experiment

► We show the first physics results from the Middle Drum detector for Telescope Array. ► We quantify a spectral and energy scale comparison between Middle Drum and HiRes-1. ► We quantify a comparison between Middle Drum monocular and hybrid observation. ► We justify the transfer of the HiRes energy scale to all of Telescope Array.