An electrical device includes a plurality of integrated circuits respectively fabricated in a first substrate bonded to a second substrate by a bond that deforms above, but not below, a deformation condition. Before a succeeding sheet bundle is discharged onto a preceding sheet bundle, the folded bundle tray moves the preceding sheet bundle in the upstream direction with respect to the sheet conveyance direction to place the trailing edge of the preceding sheet bundle at a position upstream of the leading edge of the succeeding sheet bundle. A method includes the steps of producing hydrogen gas and a hydrocarbon fuel, blending the hydrogen gas and the hydrocarbon fuel into the hydrogen enriched fuel, using the hydrogen enriched fuel in the engine, and tracking emissions during the producing step and during the using step. The light proceeding within the lens between the first and second inward-facing surfaces is reflected at least twice on at least one of the first and second inward-facing surfaces as it travels between the first aperture and the second aperture. The higher the rotational speed, the lower the erasure performance.