  Images of the Crab Nebula have been obtained through custom interference
filters which transmit emission from the expanding supernova remnant in HI,
HeI, HeII, [CI], [NII], [OI], [SII], and [SIII] emission lines. We present both
raw and flux-calibrated data. Arrays of 19,440 photoionization models, with
extensive input abundance ranges, were matched pixel by pixel to the calibrated
data in order to derive corresponding element abundance or mass-fraction
distributions for helium, carbon, nitrogen, oxygen, and sulfur. These maps show
distinctive structure, and they illustrate regions of gas in which various
stages of nucleosynthesis have apparently occurred, including the CNO-cycle,
helium-burning, carbon-burning, and oxygen-burning. It is hoped that the
calibrated observations and chemical abundance distribution maps will be useful
for developing a better understanding of the precursor star evolution and the
supernova explosive process.
