An FT-IR microscope is operated in association with a scanning spectrometer in such a way that incremental movement of the movable stage of the microscope is synchronized with the scans of the scanning spectrometer. A measuring circuit includes at least one digital analog converter that constitutes, in combination with a number of comparators, an analog digital converter to determine the electric voltages of the battery cells. Use of these polymers to eliminate or reduce the tack and to maintain the staying power of a film or deposit obtained from a composition with an optical effect containing them. The mouthpiece shank is then inserted through the aperture for concentric positioning within the receiver with the prongs spacing the shank from the inner walls of the receiver. Additionally, the thermal properties of carbon nanotubes allow thermal energy to flow efficiently between the fabric and a heat sink or source.